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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Part II - Mileage

In 1998, with the Interstate System essentially complete, FHWA's Office of Engineering compiled information about development of the program. In making this information available to the public, we have not updated the material. All information is as of 1998 when the Office of Engineering compiled the report.

Summary

Dwight D. Eisenhower System of Interstate & Defense Highways Route Summary as of 12/31/97
Mileage Designation Main Routes Loops Spurs Total
23 USC 103(e) 38,963.40 2,741.47 1,089.62 42,794.49
23 USC 139(a) 1,182.34 493.33 432.66 2,108.33
NHS Act 109.70 -- -- 109.70
Miles That Overlap Other Routes 1,045.45 35.77 -- 1,081.22
TOTAL Length Including Overlap 41,300.89 3,270.57 1,522.28 46,093.74
NET Length Excluding Overlap 40,255.44 3,234.80 1,522.28 45,012.52
Number of Routes 66 130 104 300
Footnotes:
  • 23 USC 103(e) mileage is designated under Sections 103(e)(1), (2) & (3) of Title 23 U.S. Code and most was constructed with 90 percent Federal-Aid Interstate Construction funds.
  • 23 USC 139(a) mileage is designated under Section 139(a) of Title 23 and was built without Interstate Construction fund participation.
  • NHS Act routes were added in accordance with Section 332(a) of the NHS Act of 1995.
  • Overlap mileage is included in the Total Length of each overlap route.
  • NET Lengths only include the overlap mileage once, as assigned to the predominant route.

Interstate Routes and Their Lengths (in miles)
State Interstate Route No "CHARGEABLE" MILEAGE "N0N-CHARGEABLE" MILEAGE Mileage of Other Overlapping Routes Overlap Route Number Net Length w/o Overlap (Miles) Total Length (Miles)
Original 42,500 Miles 23 USC 103(e)(1),(3) Howard-Cramer Additions 23 USC 103(e)(2) Subtotal 103e(1),(2)(3) Miles Added Under 23 USC 139(a) High Priority Route Additions per NHS Act
AL 10 66.30 -- 66.30 -- -- --   66.30 66.30
AL 20 84.60 -- 84.60 -- -- 130.10 I-59 84.60 214.70
AL 59 241.40 --- 241.40 --- --- ---   241.40 241.40
AL 65 367.00 --- 367.00 --- --- ---   367.00 367.00
AL 85 80.00 --- 80.00 --- --- ---   80.00 80.00
AL 165 4.90 --- 4.90 --- --- ---   4.90 4.90
AL 359 2.30 --- 2.30 --- --- ---   2.30 2.30
AL 459 32.80 --- 32.80 --- --- ---   32.80 32.80
AL 565 21.40 --- 21.40 --- --- ---   21.40 21.40
AL 759 4.50 --- 4.50 --- --- ---   4.50 4.50
AL 10 Routes 905.20 0.00 905.20 0.00 0.00 130.10   905.20 1,035.30
 
AZ 8 178.32 --- 178.32 --- --- ---   178.32 178.32
AZ 10 391.94 --- 391.94 --- --- ---   391.94 391.94
AZ 15 29.37 --- 29.37 --- --- ---   29.37 29.37
AZ 17 145.24 --- 145.24 --- --- ---   145.24 145.24
AZ 19 63.35 --- 63.35 --- --- ---   63.35 63.35
AZ 40 359.23 --- 359.23 --- --- ---   359.23 359.23
AZ  6 Routes 1,167.45 0.00 1,167.45 0.00 0.00 0.00   1,167.45 1,167.45
 
AR 30 143.08 --- 143.08 --- --- ---   143.08 143.08
AR 40 284.80 --- 284.80 --- --- ---   284.80 284.80
AR 55 70.00 --- 70.00 --- --- 2.22 I-40 70.00 72.22
AR 430 12.93 --- 12.93 --- --- ---   12.93 12.93
AR 440 --- --- 0.00 9.96 --- ---   9.96 9.96
AR 540 8.13 --- 8.13 5.97 --- ---   14.10 14.10
AR 630 7.40 --- 7.40 --- --- ---   7.40 7.40
AR  7 Routes 526.34 0.00 526.34 15.93 0.00 2.22   542.27 544.49
 
CA 5 797.01 --- 797.01 --- --- ---   797.01 797.01
CA 8 170.00 --- 170.00 --- --- ---   170.00 170.00
CA 10 240.90 --- 240.90 --- --- 1.60 I-5 240.90 242.50
CA 15 287.30 --- 287.30 --- --- ---   287.30 287.30
CA 40 154.60 --- 154.60 --- --- ---   154.60 154.60
CA 80 202.20 --- 202.20 --- --- ---   202.20 202.20
CA 105 10.30 7.00 17.30 --- --- ---   17.30 17.30
CA 110 20.50 --- 20.50 --- --- ---   20.50 20.50
CA 205 13.00 --- 13.00 --- --- ---   13.00 13.00
CA 210 48.60 --- 48.60 --- --- ---   48.60 48.60
CA 215 --- --- 0.00 54.50 --- ---   54.50 54.50
CA 238 --- --- 0.00 2.10 --- ---   2.10 2.10
CA 280 57.10 --- 57.10 --- --- ---   57.10 57.10
CA 305 5.30 --- 5.30 --- --- ---   5.30 5.30
CA 380 3.30 --- 3.30 --- --- ---   3.30 3.30
CA 405 72.40 --- 72.40 --- --- ---   72.40 72.40
CA 505 32.90 --- 32.90 --- --- ---   32.90 32.90
CA 580 68.40 --- 68.40 7.30 --- ---   75.70 75.70
CA 605 27.40 --- 27.40 --- --- ---   27.40 27.40
CA 680 58.00 --- 58.00 12.50 --- ---   70.50 70.50
CA 710 --- --- 0.00 19.70 --- ---   19.70 19.70
CA 780 6.50 --- 6.50 --- --- ---   6.50 6.50
CA 805 28.00 --- 28.00 --- --- ---   28.00 28.00
CA 880 --- --- 0.00 44.70 --- ---   44.70 44.70
CA 980 0.80 --- 0.80 1.00 --- ---   1.80 1.80
CA 25 Routes 2,304.51 7.00 2,311.51 141.80 0.00 1.60   2,453.31 2,454.91
 
CO 25 298.94 --- 298.94 --- --- ---   298.94 298.94
CO 70 450.30 --- 450.30 --- --- ---   450.30 450.30
CO 76 184.14 --- 184.14 --- --- ---   184.14 184.14
CO 225 12.18 --- 12.18 --- --- ---   12.18 12.18
CO 270 5.20 --- 5.20 --- --- ---   5.20 5.20
CO  5 Routes 950.76 0.00 950.76 0.00 0.00 0.00   950.76 950.76
 
CT 84 98.52 --- 98.52 --- --- ---   98.52 98.52
CT 91 57.98 --- 57.98 --- --- ---   57.98 57.98
CT 95 111.57 --- 111.57 --- --- ---   111.57 111.57
CT 291 5.88 --- 5.88 --- --- ---   5.88 5.88
CT 384 7.40 --- 7.40 --- --- ---   7.40 7.40
CT 395 --- --- 0.00 54.69 --- ---   54.69 54.69
CT 684 1.40 --- 1.40 --- --- ---   1.40 1.40
CT 691 1.60 6.69 8.29 --- --- ---   8.29 8.29
CT  8 Routes 284.35 6.69 291.04 54.69 0.00 0.00   345.73 345.73
 
DE 95 23.43 --- 23.43 --- --- ---   23.43 23.43
DE 295 5.71 --- 5.71 --- --- ---   5.71 5.71
DE 495 11.47 --- 11.47 --- --- ---   11.47 11.47
DE  3 Routes 40.61 0.00 40.61 0.00 0.00 0.00   40.61 40.61
 
DC 66 1.11 --- 1.11 --- --- ---   1.11 1.11
DC 95 0.12 --- 0.12 --- --- ---   0.12 0.12
DC 295 7.72 --- 7.72 --- --- ---   7.72 7.72
DC 395 3.49 --- 3.49 --- --- ---   3.49 3.49
DC 695 1.21 --- 1.21 --- --- ---   1.21 1.21
DC  5 Routes 13.65 0.00 13.65 0.00 0.00 0.00   13.65 13.65
 
FL 4 132.06 --- 132.06 --- --- ---   132.06 132.06
FL 10 362.82 --- 362.82 --- --- ---   362.82 362.82
FL 75 425.75 46.31 472.06 --- --- ---   472.06 472.06
FL 95 382.40 --- 382.40 --- --- ---   382.40 382.40
FL 110 6.39 --- 6.39 --- --- ---   6.39 6.39
FL 175 --- --- 0.00 1.44 --- ---   1.44 1.44
FL 195 4.41 --- 4.41 --- --- ---   4.41 4.41
FL 275 59.58 --- 59.58 --- --- ---   59.58 59.58
FL 295 35.06 --- 35.06 --- --- ---   35.06 35.06
FL 375 --- --- 0.00 1.34 --- ---   1.34 1.34
FL 395 1.21 --- 1.21 --- --- ---   1.21 1.21
FL 595 4.20 --- 4.20 8.80 --- ---   13.00 13.00
FL 12 Routes 1,413.88 46.31 1,460.19 11.58 0.00 0.00   1,471.77 1,471.77
 
GA 16 165.41 --- 165.41 --- --- ---   165.41 165.41
GA 20 201.75 --- 201.75 --- --- ---   201.75 201.75
GA 24 4.12 --- 4.12 --- --- ---   4.12 4.12
GA 59 19.94 --- 19.94 --- --- ---   19.94 19.94
GA 75 355.00 --- 355.00 --- --- ---   355.00 355.00
GA 85 170.94 --- 170.94 --- --- 8.00 I-75 170.94 178.94
GA 95 111.69 --- 111.69 --- --- ---   111.69 111.69
GA 185 43.57 --- 43.57 5.50 --- ---   49.07 49.07
GA 285 61.63 --- 61.63 --- --- 1.21 I-85 61.63 62.84
GA 475 15.59 --- 15.59 --- --- ---   15.59 15.59
GA 516 --- --- 0.00 6.40 --- ---   6.40 6.40
GA 520 1.00 9.11 10.11 --- --- ---   10.11 10.11
GA 575 1.70 29.16 30.86 --- --- ---   30.86 30.86
GA 675 2.47 7.78 10.25 --- --- ---   10.25 10.25
GA 985 --- --- 0.00 24.40 --- ---   24.40 24.40
GA 15 Routes 1,154.81 46.05 1,200.86 36.30 0.00 9.21   1,237.16 1,246.37
 
HI H-1 26.90 --- 26.90 --- --- ---   26.90 26.90
HI H-2 8.23 --- 8.23 --- --- ---   8.23 8.23
HI H-3 16.09 --- 16.09 --- --- ---   16.09 16.09
HI  H-201 --- --- 0.00 4.10 --- ---   4.10 4.10
HI  4 Routes 51.22 0.00 51.22 4.10 0.00 0.00   55.32 55.32
 
ID 15 195.87 --- 195.87 --- --- ---   195.87 195.87
ID 84 275.36 --- 275.36 --- --- ---   275.36 275.36
ID 86 63.18 --- 63.18 --- --- ---   63.18 63.18
ID 90 73.73 --- 73.73 --- --- ---   73.73 73.73
ID 184 3.52 --- 3.52 --- --- ---   3.52 3.52
ID  5 Routes 611.66 0.00 611.66 0.00 0.00 0.00   611.66 611.66
 
IL 24 38.73 --- 38.73 --- --- ---   38.73 38.73
IL 39 --- --- 0.00 119.59 --- ---   119.59 119.59
IL 55 275.66 --- 275.66 --- --- 18.70 I-70 275.66 294.36
IL 57 352.98 --- 352.98 --- --- 5.59 I-70 352.98 358.57
IL 64 123.98 --- 123.98 --- --- 4.14 I-57 123.98 128.12
IL 70 160.25 --- 160.25 --- --- ---   160.25 160.25
IL 72 78.66 --- 78.66 94.00 --- ---   172.66 172.66
IL 74 214.29 --- 214.29 --- --- 5.89 I-55 214.29 220.18
IL 80 163.52 --- 163.52 --- --- ---   163.52 163.52
IL 88 --- --- 0.00 140.59 --- ---   140.59 140.59
IL 90 75.95 --- 75.95 16.71 --- 15.39 I-94 92.66 108.05
IL 94 74.89 --- 74.89 --- --- 2.48 I-80 74.89 77.37
IL 155 --- --- 0.00 32.06 --- ---   32.06 32.06
IL 172 --- --- 0.00 19.00 --- ---   19.00 19.00
IL 180 13.19 --- 13.19 --- --- ---   13.19 13.19
IL 190 --- --- 0.00 3.07 --- ---   3.07 3.07
IL 255 27.00 --- 27.00 --- --- ---   27.00 27.00
IL 270 14.97 --- 14.97 --- --- ---   14.97 14.97
IL 280 8.21 --- 8.21 --- --- 9.39 I-74 8.21 17.60
IL 290 29.84 --- 29.84 --- --- ---   29.84 29.84
IL 294 48.10 --- 48.10 --- --- 5.32 I-80 48.10 53.42
IL 355 --- --- 0.00 20.01 --- ---   20.01 20.01
IL 474 14.88 --- 14.88 --- --- ---   14.88 14.88
IL 23 Routes 1,715.10 0.00 1,715.10 445.03 0.00 66.90   2,160.13 2,227.03
 
IN 64 124.04 --- 124.04 --- --- ---   124.04 124.04
IN 65 262.08 --- 262.08 --- --- ---   262.08 262.08
IN 69 157.79 --- 157.79 --- --- ---   157.79 157.79
IN 70 154.14 --- 154.14 --- --- 2.13 I-65 154.14 156.27
IN 74 151.27 --- 151.27 --- --- 20.60 I-465 151.27 171.87
IN 80 151.65 --- 151.65 --- --- ---   151.65 151.65
IN 90 21.30 --- 21.30 --- --- 135.60 I-80 21.30 156.90
IN 94 29.68 --- 29.68 --- --- 16.05 I-80 29.68 45.73
IN 164 21.43 --- 21.43 --- --- ---   21.43 21.43
IN 265 6.73 --- 6.73 --- --- ---   6.73 6.73
IN 275 3.30 --- 3.30 --- --- ---   3.30 3.30
IN 465 53.14 --- 53.14 5.03 --- ---   58.17 58.17
IN 469 --- --- 0.00 29.60 --- ---   29.60 29.60
IN 13 Routes 1,136.55 0.00 1,136.55 34.63 0.00 174.38   1,171.18 1,345.56
 
IA 29 148.81 --- 148.81 --- --- 3.00 I-80 148.81 151.81
IA 35 218.47 --- 218.47 --- --- ---   218.47 218.47
IA 74 5.39 --- 5.39 --- --- ---   5.39 5.39
IA 80 292.28 --- 292.28 --- --- 14.29 !-35 292.28 306.57
IA 129 0.28 --- 0.28 --- --- ---   0.28 0.28
IA 235 13.85 --- 13.85 --- --- ---   13.85 13.85
IA 280 9.40 --- 9.40 --- --- ---   9.40 9.40
IA 380 73.12 --- 73.12 --- --- ---   73.12 73.12
IA 480 0.75 --- 0.75 --- --- ---   0.75 0.75
IA 680 19.71 --- 19.71 --- --- 9.91 I-29 19.71 29.62
IA 10 Routes 782.06 0.00 782.06 0.00 0.00 27.20   782.06 809.26
 
KS 35 235.52 --- 235.52 --- --- ---   235.52 235.52
KS 70 424.17 --- 424.17 --- --- ---   424.17 424.17
KS 135 95.74 --- 95.74 --- --- ---   95.74 95.74
KS 235 16.53 --- 16.53 --- --- ---   16.53 16.53
KS 335 --- --- 0.00 50.10 --- ---   50.10 50.10
KS 435 28.03 --- 28.03 --- --- ---   28.03 28.03
KS 470 11.45 --- 11.45 --- --- ---   11.45 11.45
KS 635 8.90 --- 8.90 --- --- ---   8.90 8.90
KS 670 0.84 --- 0.84 --- --- ---   0.84 0.84
KS  9 Routes 821.18 0.00 821.18 50.10 0.00 0.00   871.28 871.28
 
KY 24 93.37 --- 93.37 --- --- ---   93.37 93.37
KY 64 191.55 --- 191.55 --- --- ---   191.55 191.55
KY 65 137.60 --- 137.60 --- --- ---   137.60 137.60
KY 71 78.22 --- 78.22 --- --- 19.70 I-75 78.22 97.92
KY 75 184.70 --- 184.70 --- --- 6.90 I-64 184.70 191.60
KY 264 22.88 --- 22.88 --- --- ---   22.88 22.88
KY 265 3.28 --- 3.28 21.20 --- ---   24.48 24.48
KY 275 24.14 --- 24.14 --- --- ---   24.14 24.14
KY 471 4.80 --- 4.80 --- --- ---   4.80 4.80
KY  9 Routes 740.54 0.00 740.54 21.20 0.00 26.60   761.74 788.34
 
LA 10 274.42 --- 274.42 --- --- ---   274.42 274.42
LA 12 85.59 --- 85.59 --- --- ---   85.59 85.59
LA 20 189.87 --- 189.87 --- --- ---   189.87 189.87
LA 49 34.10 153.18 187.28 19.55 --- ---   206.83 206.83
LA 55 65.81 --- 65.81 --- --- ---   65.81 65.81
LA 59 11.48 --- 11.48 --- --- ---   11.48 11.48
LA 110 8.89 --- 8.89 --- --- ---   8.89 8.89
LA 210 12.40 --- 12.40 --- --- ---   12.40 12.40
LA 220 17.60 --- 17.60 --- --- ---   17.60 17.60
LA 310 11.50 --- 11.50 --- --- ---   11.50 11.50
LA 510 3.16 --- 3.16 --- --- ---   3.16 3.16
LA 610 4.02 --- 4.02 --- --- ---   4.02 4.02
LA 12 Routes 718.84 153.18 872.02 19.55 0.00 0.00   891.57 891.57
 
ME 95 297.89 --- 297.89 --- --- ---   297.89 297.89
ME 195 1.55 --- 1.55 --- --- ---   1.55 1.55
ME 295 10.90 --- 10.90 --- --- ---   10.90 10.90
ME 395 4.74 --- 4.74 --- --- ---   4.74 4.74
ME 495 --- --- 0.00 50.50 --- ---   50.50 50.50
 
MD 68 --- --- 0.00 80.30 --- ---   80.30 80.30
MD 70 93.23 --- 93.23 --- --- ---   93.23 93.23
MD 81 11.99 --- 11.99 --- --- ---   11.99 11.99
MD 83 34.05 --- 34.05 --- --- ---   34.05 34.05
MD 95 108.48 --- 108.48 --- --- ---   108.48 108.48
MD 97 2.67 14.90 17.57 --- --- ---   17.57 17.57
MD 195 1.33 2.20 3.53 1.40 --- ---   4.93 4.93
MD 270 34.52 --- 34.52 --- --- ---   34.52 34.52
MD 295 0.78 --- 0.78 --- --- ---   0.78 0.78
MD 370 1.49 1.18 2.67 --- --- ---   2.67 2.67
MD 395 0.72 --- 0.72 --- --- ---   0.72 0.72
MD 495 15.26 --- 15.26 --- --- ---   15.26 15.26
MD 595 0.80 19.31 20.11 --- --- ---   20.11 20.11
MD 695 28.58 --- 28.58 2.20 --- ---   30.78 30.78
MD 795 4.05 --- 4.05 5.47 --- ---   9.52 9.52
MD 895 15.00 --- 15.00 --- --- ---   15.00 15.00
MD 16 Routes 352.95 37.59 390.54 89.37 0.00 0.00   479.91 479.91
 
MA 84 8.06 --- 8.06 --- --- ---   8.06 8.06
MA 90 134.70 --- 134.70 2.90 --- ---   137.60 137.60
MA 91 54.92 --- 54.92 --- --- ---   54.92 54.92
MA 93 31.90 --- 31.90 14.10 --- ---   46.00 46.00
MA 95 52.56 --- 52.56 37.54 --- ---   90.10 90.10
MA 190 19.10 --- 19.10 --- --- ---   19.10 19.10
MA 195 25.42 --- 25.42 14.28 --- ---   39.70 39.70
MA 290 19.76 --- 19.76 --- --- ---   19.76 19.76
MA 291 5.53 --- 5.53 --- --- ---   5.53 5.53
MA 295 4.05 --- 4.05 --- --- ---   4.05 4.05
MA 391 4.68 --- 4.68 --- --- ---   4.68 4.68
MA 395 --- --- 0.00 12.29 --- ---   12.29 12.29
MA 495 88.53 12.90 101.43 18.50 --- ---   119.93 119.93
MA 13 Routes 449.21 12.90 462.11 99.61 0.00 0.00   561.72 561.72
 
MI 69 126.60 --- 126.60 66.80 --- 5.20 I-96 193.40 198.60
MI 75 395.70 --- 395.70 --- --- ---   395.70 395.70
MI 94 275.60 --- 275.60 --- --- ---   275.60 275.60
MI 96 192.70 --- 192.70 --- --- ---   192.70 192.70
MI 194 3.40 --- 3.40 --- --- ---   3.40 3.40
MI 196 80.60 --- 80.60 --- --- ---   80.60 80.60
MI 275 30.30 --- 30.30 --- --- ---   30.30 30.30
MI 296 3.40 --- 3.40 --- --- ---   3.40 3.40
MI 375 1.10 --- 1.10 --- --- ---   1.10 1.10
MI 475 16.80 --- 16.80 --- --- ---   16.80 16.80
MI 496 11.80 --- 11.80 --- --- ---   11.80 11.80
MI 675 7.80 --- 7.80 --- --- ---   7.80 7.80
MI 696 28.20 --- 28.20 --- --- ---   28.20 28.20
MI 13 Routes 1,174.00 0.00 1,174.00 66.80 0.00 5.20   1,240.80 1,246.00
 
MN 35 220.46 --- 220.46 --- --- 39.23 I-35E 220.46 259.69
MN 35E 39.23 --- 39.23 --- --- ---   39.23 39.23
MN 35W 41.78 --- 41.78 --- --- ---   41.78 41.78
MN 90 275.70 --- 275.70 --- --- ---   275.70 275.70
MN 94 259.22 --- 259.22 --- --- 0.27 I-35E 259.22 259.49
MN 394 10.03 --- 10.03 --- --- ---   10.03 10.03
MN 494 42.73 --- 42.73 --- --- ---   42.73 42.73
MN 535 1.57 --- 1.57 --- --- ---   1.57 1.57
MN 694 21.98 --- 21.98 --- --- 0.65 I-35E 21.98 22.63
MN  9 Routes 912.70 0.00 912.70 0.00 0.00 40.15   912.70 952.85
 
MS 10 77.10 --- 77.10 --- --- ---   77.10 77.10
MS 20 129.30 --- 129.30 --- --- 25.20 I-55/59 129.30 154.50
MS 55 289.70 --- 289.70 --- --- ---   289.70 289.70
MS 59 171.20 --- 171.20 --- --- ---   171.20 171.20
MS 110 4.30 --- 4.30 --- --- ---   4.30 4.30
MS 220 11.60 --- 11.60 --- --- ---   11.60 11.60
MS  6 Routes 683.20 0.00 683.20 0.00 0.00 25.20   683.20 708.40
 
MO 29 124.80 --- 124.80 --- --- 5.50 I-35/40 124.80 130.30
MO 35 113.80 --- 113.80 --- --- 1.00 I-70 113.80 114.80
MO 44 290.80 --- 290.80 --- --- ---   290.80 290.80
MO 55 208.40 --- 208.40 --- --- 1.00 I-44 208.40 209.40
MO 57 22.00 --- 22.00 --- --- ---   22.00 22.00
MO 64 --- --- 0.00 14.70 --- ---   14.70 14.70
MO 70 251.60 --- 251.60 --- --- ---   251.60 251.60
MO 155 10.60 --- 10.60 --- --- ---   10.60 10.60
MO 170 6.25 --- 6.25 4.29 --- ---   10.54 10.54
MO 229 14.60 --- 14.60 --- --- ---   14.60 14.60
MO 255 3.70 --- 3.70 --- --- ---   3.70 3.70
MO 270 35.60 --- 35.60 --- --- ---   35.60 35.60
MO 435 50.40 --- 50.40 --- --- ---   50.40 50.40
MO 470 16.50 --- 16.50 --- --- ---   16.50 16.50
MO 635 3.70 --- 3.70 --- --- ---   3.70 3.70
MO 670 0.60 --- 0.60 --- --- ---   0.60 0.60
MO 16 Routes 1,153.35 0.00 1,153.35 18.99 0.00 7.50   1,172.34 1,179.84
 
MT 15 395.09 --- 395.09 --- --- ---   395.09 395.09
MT 90 542.33 --- 542.33 --- --- 7.65 I-15 542.33 549.98
MT 94 247.91 --- 247.91 --- --- ---   247.91 247.91
MT 115 1.39 --- 1.39 --- --- ---   1.39 1.39
MT 315 0.82 --- 0.82 --- --- ---   0.82 0.82
MT  5 Routes 1,187.54 0.00 1,187.54 0.00 0.00 7.65   1,187.54 1,195.19
 
NE 76 2.48 --- 2.48 --- --- ---   2.48 2.48
NE 80 455.31 --- 455.31 --- --- ---   455.31 455.31
NE 129 3.21 --- 3.21 --- --- ---   3.21 3.21
NE 180 3.18 --- 3.18 --- --- ---   3.18 3.18
NE 480 4.04 --- 4.04 --- --- ---   4.04 4.04
NE 680 13.26 --- 13.26 --- --- ---   13.26 13.26
NE  6 Routes 481.48 0.00 481.48 0.00 0.00 0.00   481.48 481.48
 
NV 15 123.77 --- 123.77 --- --- ---   123.77 123.77
NV 80 410.67 --- 410.67 --- --- ---   410.67 410.67
NV 515 6.00 --- 6.00 14.90 --- ---   20.90 20.90
NV 580 3.00 --- 3.00 1.21 --- ---   4.21 4.21
NV  4 Routes 543.44 0.00 543.44 16.11 0.00 0.00   559.55 559.55
 
NH 89 60.93 --- 60.93 --- --- ---   60.93 60.93
NH 93 131.81 --- 131.81 --- --- ---   131.81 131.81
NH 95 16.13 --- 16.13 --- --- ---   16.13 16.13
NH 293 5.54 --- 5.54 5.68 --- ---   11.22 11.22
NH 393 4.60 --- 4.60 --- --- ---   4.60 4.60
NH  5 Routes 219.01 0.00 219.01 5.68 0.00 0.00   224.69 224.69
 
NJ 76 2.80 --- 2.80 --- --- ---   2.80 2.80
NJ 78 68.15 --- 68.15 --- --- ---   68.15 68.15
NJ 80 68.10 --- 68.10 --- --- ---   68.10 68.10
NJ 95 79.08 --- 79.08 --- --- ---   79.08 79.08
NJ 195 7.00 27.30 34.30 --- --- ---   34.30 34.30
NJ 278 2.00 --- 2.00 --- --- ---   2.00 2.00
NJ 280 18.10 --- 18.10 --- --- ---   18.10 18.10
NJ 287 67.40 --- 67.40 --- --- ---   67.40 67.40
NJ 295 77.30 --- 77.30 --- --- ---   77.30 77.30
NJ 676 4.60 --- 4.60 --- --- ---   4.60 4.60
NJ 10 Routes 394.53 27.30 421.83 0.00 0.00 0.00   421.83 421.83
 
NM 10 164.28 --- 164.28 --- --- ---   164.28 164.28
NM 25 462.11 --- 462.11 --- --- ---   462.11 462.11
NM 40 373.51 --- 373.51 --- --- ---   373.51 373.51
NM  3 Routes 999.90 0.00 999.90 0.00 0.00 0.00   999.90 999.90
 
NY 78 0.50 --- 0.50 --- --- ---   0.50 0.50
NY 81 184.10 --- 184.10 --- --- ---   184.10 184.10
NY 84 71.60 --- 71.60 --- --- ---   71.60 71.60
NY 87 302.95 --- 302.95 29.80 --- ---   332.75 332.75
NY 88 117.77 --- 117.77 --- --- ---   117.77 117.77
NY 90 386.77 --- 386.77 --- --- ---   386.77 386.77
NY 95 23.25 --- 23.25 --- --- ---   23.25 23.25
NY 190 28.45 --- 28.45 --- --- ---   28.45 28.45
NY 278 33.25 --- 33.25 --- --- ---   33.25 33.25
NY 287 11.60 --- 11.60 --- --- ---   11.60 11.60
NY 290 9.96 --- 9.96 --- --- ---   9.96 9.96
NY 295 9.00 --- 9.00 --- --- ---   9.00 9.00
NY 390 14.40 60.50 74.90 --- --- ---   74.90 74.90
NY 478 --- --- 0.00 1.90 --- ---   1.90 1.90
NY 481 14.99 --- 14.99 --- --- ---   14.99 14.99
NY 490 37.97 --- 37.97 --- --- ---   37.97 37.97
NY 495 3.60 --- 3.60 62.70 --- ---   66.30 66.30
NY 587 1.40 --- 1.40 --- --- ---   1.40 1.40
NY 590 --- 5.10 5.10 --- --- ---   5.10 5.10
NY 678 6.30 --- 6.30 7.80 --- ---   14.10 14.10
NY 684 26.60 --- 26.60 --- --- ---   26.60 26.60
NY 690 14.60 --- 14.60 --- --- ---   14.60 14.60
NY 787 10.50 --- 10.50 --- --- ---   10.50 10.50
NY 790 2.55 --- 2.55 --- --- ---   2.55 2.55
NY 878 0.70 --- 0.70 --- --- ---   0.70 0.70
NY 890 8.90 --- 8.90 --- --- ---   8.90 8.90
NY 895 1.10 --- 1.10 --- --- ---   1.10 1.10
NY 990 4.14 --- 4.14 2.04 --- ---   6.18 6.18
NY 28 Routes 1,326.95 65.60 1,392.55 104.24 0.00 0.00   1,496.79 1,496.79
 
NC 26 39.95 --- 39.95 --- --- ---   39.95 39.95
NC 40 288.49 --- 288.49 91.40 --- 38.98 I-40 379.89 418.87
NC 73 --- --- 0.00 --- 56.70 ---   56.70 56.70
NC 77 99.47 --- 99.47 5.80 --- ---   105.27 105.27
NC 85 233.41 --- 233.41 --- --- ---   233.41 233.41
NC 95 181.39 --- 181.39 --- --- ---   181.39 181.39
NC 240 2.22 --- 2.22 6.92 --- ---   9.14 9.14
NC 277 2.69 --- 2.69 1.72 --- ---   4.41 4.41
NC 440 --- --- 0.00 16.70 --- ---   16.70 16.70
NC 540 --- --- 0.00 5.00 --- ---   5.00 5.00
NC 10 Routes 847.62 0.00 847.62 127.54 56.70 38.98   1,031.86 1,070.84
 
ND 29 217.50 --- 217.50 --- --- ---   217.50 217.50
ND 94 352.50 --- 352.50 --- --- ---   352.50 352.50
ND 194 1.19 --- 1.19 --- --- ---   1.19 1.19
ND 3 Routes 571.19 0.00 571.19 0.00 0.00 0.00   571.19 571.19
 
OH 70 225.69 --- 225.69 --- --- ---   225.69 225.69
OH 71 245.70 --- 245.70 --- --- 1.96 I-75/70 245.70 247.66
OH 74 19.45 --- 19.45 --- --- ---   19.45 19.45
OH 75 211.53 --- 211.53 --- --- ---   211.53 211.53
OH 76 77.82 --- 77.82 --- --- ---   77.82 77.82
OH 77 163.10 --- 163.10 --- --- ---   163.10 163.10
OH 80 202.07 --- 202.07 35.00 --- ---   237.07 237.07
OH 90 101.33 --- 101.33 --- --- 142.80 I-80 101.33 244.13
OH 270 55.08 --- 55.08 --- --- ---   55.08 55.08
OH 271 35.79 --- 35.79 --- --- 5.84 I-480 35.79 41.63
OH 275 52.09 --- 52.09 --- --- 3.45 I-74 52.09 55.54
OH 277 3.62 --- 3.62 --- --- ---   3.62 3.62
OH 280 12.43 --- 12.43 --- --- ---   12.43 12.43
OH 470 6.40 --- 6.40 --- --- ---   6.40 6.40
OH 471 0.54 --- 0.54 --- --- ---   0.54 0.54
OH 475 19.92 --- 19.92 --- --- ---   19.92 19.92
OH 480 42.88 --- 42.88 --- --- ---   42.88 42.88
OH 490 1.71 --- 1.71 --- --- ---   1.71 1.71
OH 670 10.68 --- 10.68 --- --- ---   10.68 10.68
OH 675 25.91 --- 25.91 --- --- ---   25.91 25.91
OH 680 16.65 --- 16.65 --- --- ---   16.65 16.65
OH 21 Routes 1,530.39 0.00 1,530.39 35.00 0.00 154.05   1,565.39 1,719.44
 
OK 35 235.96 --- 235.96 --- --- ---   235.96 235.96
OK 40 329.50 --- 329.50 --- --- 1.53 I-35 329.50 331.03
OK 44 209.40 --- 209.40 114.76 --- 4.37 I-35 324.16 328.53
OK 235 3.66 --- 3.66 1.54 --- ---   5.20 5.20
OK 240 11.87 --- 11.87 4.35 --- ---   16.22 16.22
OK 244 15.75 --- 15.75 --- --- ---   15.75 15.75
OK 444 2.51 --- 2.51 --- --- ---   2.51 2.51
OK 7 Routes 808.65 0.00 808.65 120.65 0.00 5.90   929.30 935.20
 
OR 5 308.41 --- 308.41 --- --- ---   308.41 308.41
OR 82 10.72 --- 10.72 --- --- ---   10.72 10.72
OR 84 368.34 --- 368.34 6.89 --- ---   375.23 375.23
OR 105 3.49 --- 3.49 --- --- ---   3.49 3.49
OR 205 26.07 --- 26.07 --- --- ---   26.07 26.07
OR 405 3.39 --- 3.39 --- --- ---   3.39 3.39
OR 6 Routes 720.42 0.00 720.42 6.89 0.00 0.00   727.31 727.31
 
PA 70 81.51 --- 81.51 --- --- 87.22 I-76 81.51 168.73
PA 76 351.25 --- 351.25 --- --- ---   351.25 351.25
PA 78 76.69 --- 76.69 --- --- ---   76.69 76.69
PA 79 180.18 --- 180.18 --- --- 3.55 I-70 180.18 183.73
PA 80 311.24 --- 311.24 --- --- ---   311.24 311.24
PA 81 233.70 --- 233.70 --- --- ---   233.70 233.70
PA 83 50.06 --- 50.06 --- --- ---   50.06 50.06
PA 84 49.75 --- 49.75 --- --- ---   49.75 49.75
PA 90 46.60 --- 46.60 --- --- ---   46.60 46.60
PA 95 50.85 --- 50.85 --- --- ---   50.85 50.85
PA 99 --- --- 0.00 --- 53.00 ---   53.00 53.00
PA 176 11.27 --- 11.27 --- --- ---   11.27 11.27
PA 180 --- --- 0.00 28.80 --- ---   28.80 28.80
PA 276 29.38 --- 29.38 --- --- ---   29.38 29.38
PA 279 19.07 --- 19.07 --- --- ---   19.07 19.07
PA 283 3.07 --- 3.07 --- --- ---   3.07 3.07
PA 376 14.69 --- 14.69 --- --- ---   14.69 14.69
PA 380 28.30 --- 28.30 --- --- ---   28.30 28.30
PA 476 21.25 --- 21.25 110.00 --- ---   131.25 131.25
PA 579 1.30 --- 1.30 --- --- ---   1.30 1.30
PA 676 2.59 --- 2.59 --- --- ---   2.59 2.59
PA 21 Routes 1,562.75 0.00 1,562.75 138.80 53.00 90.77   1,754.55 1,845.32
 
RI 95 43.31 --- 43.31 --- --- ---   43.31 43.31
RI 195 4.17 --- 4.17 --- --- ---   4.17 4.17
RI 295 23.34 --- 23.34 --- --- ---   23.34 23.34
RI 3 Routes 70.82 0.00 70.82 0.00 0.00 0.00   70.82 70.82
 
SC 20 141.51 --- 141.51 --- --- ---   141.51 141.51
SC 26 220.95 --- 220.95 --- --- ---   220.95 220.95
SC 77 75.17 --- 75.17 9.50 --- ---   84.67 84.67
SC 85 106.28 --- 106.28 --- --- ---   106.28 106.28
SC 95 198.76 --- 198.76 --- --- ---   198.76 198.76
SC 126 3.68 --- 3.68 --- --- ---   3.68 3.68
SC 185 2.98 --- 2.98 --- --- ---   2.98 2.98
SC 326 5.24 --- 5.24 --- --- ---   5.24 5.24
SC 385 6.21 --- 6.21 36.00 --- ---   42.21 42.21
SC 526 8.98 --- 8.98 11.20 --- ---   20.18 20.18
SC 585 2.25 --- 2.25 --- --- ---   2.25 2.25
SC 11 Routes 772.01 0.00 772.01 56.70 0.00 0.00   828.71 828.71
 
SD 29 252.65 --- 252.65 --- --- ---   252.65 252.65
SD 90 412.84 --- 412.84 --- --- ---   412.84 412.84
SD 190 1.61 --- 1.61 --- --- ---   1.61 1.61
SD 229 11.63 --- 11.63 --- --- ---   11.63 11.63
SD 4 Routes 678.73 0.00 678.73 0.00 0.00 0.00   678.73 678.73
 
TN 24 175.00 --- 175.00 --- --- 5.30 I-40/65 175.00 180.30
TN 40 455.25 --- 455.25 --- --- ---   455.25 455.25
TN 55 12.20 --- 12.20 --- --- ---   12.20 12.20
TN 65 120.40 --- 120.40 --- --- 1.00 I-40 120.40 121.40
TN 75 142.00 --- 142.00 --- --- 19.60 I-40 142.00 161.60
TN 81 75.30 --- 75.30 --- --- ---   75.30 75.30
TN 124 1.90 --- 1.90 --- --- ---   1.90 1.90
TN 140 --- --- 0.00 11.20 --- ---   11.20 11.20
TN 155 16.10 --- 16.10 --- --- ---   16.10 16.10
TN 181 --- --- 0.00 23.80 --- ---   23.80 23.80
TN 240 19.00 --- 19.00 --- --- ---   19.00 19.00
TN 265 2.25 --- 2.25 --- --- ---   2.25 2.25
TN 275 2.90 --- 2.90 --- --- ---   2.90 2.90
TN 440 7.50 --- 7.50 --- --- ---   7.50 7.50
TN 640 7.10 --- 7.10 --- --- ---   7.10 7.10
TN 15 Routes 1,036.90 0.00 1,036.90 35.00 0.00 25.90   1,071.90 1,097.80
 
TX 10 878.21 --- 878.21 --- --- 2.39 I-35 878.21 880.60
TX 20 633.98 --- 633.98 2.00 --- ---   635.98 635.98
TX 27 111.48 --- 111.48 12.90 --- ---   124.38 124.38
TX 30 193.70 --- 193.70 29.93 --- ---   223.63 223.63
TX 35 406.88 --- 406.88 --- --- 96.95 I-35E 406.88 503.83
TX 35E 96.95 --- 96.95 --- --- ---   96.95 96.95
TX 35W 85.20 --- 85.20 --- --- ---   85.20 85.20
TX 37 143.06 --- 143.06 --- --- ---   143.06 143.06
TX 40 177.00 --- 177.00 --- --- ---   177.00 177.00
TX 44 --- --- 0.00 14.70 --- ---   14.70 14.70
TX 45 284.99 --- 284.99 --- --- ---   284.99 284.99
TX 110 0.94 --- 0.94 --- --- ---   0.94 0.94
TX 345 1.26 --- 1.26 --- --- ---   1.26 1.26
TX 410 39.23 --- 39.23 9.93 --- ---   49.16 49.16
TX 610 38.01 --- 38.01 --- --- ---   38.01 38.01
TX 635 36.94 --- 36.94 --- --- ---   36.94 36.94
TX 820 34.75 --- 34.75 --- --- ---   34.75 34.75
TX 17 Routes 3,162.58 0.00 3,162.58 69.46 0.00 99.34   3,232.04 3,331.38
 
UT 15 405.49 --- 405.49 --- --- ---   405.49 405.49
UT 70 230.77 --- 230.77 --- --- ---   230.77 230.77
UT 80 194.27 --- 194.27 --- --- 3.31 I-15 194.27 197.58
UT 84 81.20 --- 81.20 --- --- 35.98 I-15 81.20 117.18
UT 215 29.59 --- 29.59 --- --- ---   29.59 29.59
UT 5 Routes 941.32 0.00 941.32 0.00 0.00 39.29   941.32 980.61
 
VT 89 130.39 --- 130.39 --- --- ---   130.39 130.39
VT 91 177.62 --- 177.62 --- --- ---   177.62 177.62
VT 93 11.06 --- 11.06 --- --- ---   11.06 11.06
VT 189 1.37 --- 1.37 --- --- ---   1.37 1.37
VT 4 Routes 320.44 0.00 320.44 0.00 0.00 0.00   320.44 320.44
 
VA 64 268.52 --- 268.52 --- --- 30.40 I-81 268.52 298.92
VA 66 75.26 --- 75.26 --- --- ---   75.26 75.26
VA 77 58.60 --- 58.60 --- --- 8.80 I-81 58.60 67.40
VA 81 324.01 --- 324.01 --- --- ---   324.01 324.01
VA 85 68.52 --- 68.52 --- --- ---   68.52 68.52
VA 95 150.23 --- 150.23 24.08 --- ---   174.31 174.31
VA 195 3.20 --- 3.20 --- --- ---   3.20 3.20
VA 264 13.17 --- 13.17 --- --- ---   13.17 13.17
VA 295 52.86 --- 52.86 --- --- ---   52.86 52.86
VA 381 1.17 --- 1.17 --- --- ---   1.17 1.17
VA 395 9.59 --- 9.59 --- --- ---   9.59 9.59
VA 464 5.71 --- 5.71 --- --- ---   5.71 5.71
VA 495 14.39 --- 14.39 --- --- ---   14.39 14.39
VA 564 2.94 --- 2.94 --- --- ---   2.94 2.94
VA 581 6.40 --- 6.40 --- --- ---   6.40 6.40
VA 664 10.77 --- 10.77 9.20 --- ---   19.97 19.97
VA 16 Routes 1,065.34 0.00 1,065.34 33.28 0.00 39.20   1,098.62 1,137.82
 
WA 5 276.62 --- 276.62 --- --- ---   276.62 276.62
WA 82 132.26 --- 132.26 --- --- ---   132.26 132.26
WA 90 297.01 --- 297.01 --- --- ---   297.01 297.01
WA 182 15.20 --- 15.20 --- --- ---   15.20 15.20
WA 205 10.93 --- 10.93 --- --- ---   10.93 10.93
WA 405 30.33 --- 30.33 --- --- ---   30.33 30.33
WA 705 1.50 --- 1.50 --- --- ---   1.50 1.50
WA 7 Routes 763.85 0.00 763.85 0.00 0.00 0.00   763.85 763.85
 
WV 64 122.98 --- 122.98 --- --- 63.88 I-77 122.98 186.86
WV 68 --- --- 0.00 31.80 --- ---   31.80 31.80
WV 70 14.45 --- 14.45 --- --- ---   14.45 14.45
WV 77 187.21 --- 187.21 --- --- ---   187.21 187.21
WV 79 160.52 --- 160.52 --- --- ---   160.52 160.52
WV 81 26.00 --- 26.00 --- --- ---   26.00 26.00
WV 470 3.95 --- 3.95 --- --- ---   3.95 3.95
WV 7 Routes 515.11 0.00 515.11 31.80 0.00 63.88   546.91 610.79
 
WI 39 --- --- 0.00 104.00 --- ---   104.00 104.00
WI 43 119.58 --- 119.58 63.00 --- ---   182.58 182.58
WI 90 187.17 --- 187.17 --- --- ---   187.17 187.17
WI 94 256.35 --- 256.35 --- --- ---   256.35 256.35
WI 535 1.22 --- 1.22 --- --- ---   1.22 1.22
WI 794 3.75 --- 3.75 --- --- ---   3.75 3.75
WI 894 10.02 --- 10.02 --- --- ---   10.02 10.02
WI 7 Routes 578.09 0.00 578.09 167.00 0.00 0.00   745.09 745.09
 
WY 25 300.90 --- 300.90 --- --- ---   300.90 300.90
WY 80 402.86 --- 402.86 --- --- ---   402.86 402.86
WY 90 208.79 --- 208.79 --- --- ---   208.79 208.79
WY 180 1.06 --- 1.06 --- --- ---   1.06 1.06
WY 4 Routes 913.61 0.00 913.61 0.00 0.00 0.00   913.61 913.61
GRAND TOTALS 42,391.87 402.62 42,794.49 2,108.33 109.70 1,081.22   45,012.52 46,093.74
Footnote: Overlap mileage is included in the Total Length of each overlap route. The Net Length mileages only include the overlap mileage once, as assigned by the State to the predominant route.
Miles of Interstate Routes by State
(States Sorted Alphabetically)
State Number of Routes "CHARGEABLE" MILES UNDER 23 USC 103(e) "N0N-CHARGEABLE" MILEAGE Mileage of Other Overlap Routes TOTAL Length With Overlap Miles NET Length Without Overlap Miles
Original 42,500 Miles (e)(1),(3) Howard-Cramer Additions (e)(2) Subtotal 103(e) Miles Added Title 23 139(a) High Priority Rte Additions per NHS Act
AL 10 905.20 0.00 905.20 0.00 0.00 130.10 1,035.30 905.20
AZ 6 1,167.45 0.00 1,167.45 0.00 0.00 0.00 1,167.45 1,167.45
AR 7 526.34 0.00 526.34 15.93 0.00 2.22 544.49 542.27
CA 25 2,304.51 7.00 2,311.51 141.80 0.00 1.60 2,454.91 2,453.31
CO 5 950.76 0.00 950.76 0.00 0.00 0.00 950.76 950.76
CT 8 284.35 6.69 291.04 54.69 0.00 0.00 345.73 345.73
DE 3 40.61 0.00 40.61 0.00 0.00 0.00 40.61 40.61
DC 5 13.65 0.00 13.65 0.00 0.00 0.00 13.65 13.65
FL 12 1,413.88 46.31 1,460.19 11.58 0.00 0.00 1,471.77 1,471.77
GA 15 1,154.81 46.05 1,200.86 36.30 0.00 9.21 1,246.37 1,237.16
HI 4 51.22 0.00 51.22 4.10 0.00 0.00 55.32 55.32
ID 5 611.66 0.00 611.66 0.00 0.00 0.00 611.66 611.66
IL 23 1,715.10 0.00 1,715.10 445.03 0.00 66.90 2,227.03 2,160.13
IN 13 1,136.55 0.00 1,136.55 34.63 0.00 174.38 1,345.56 1,171.18
IA 10 782.06 0.00 782.06 0.00 0.00 27.20 809.26 782.06
KS 9 821.18 0.00 821.18 50.10 0.00 0.00 871.28 871.28
KY 9 740.54 0.00 740.54 21.20 0.00 26.60 788.34 761.74
LA 12 718.84 153.18 872.02 19.55 0.00 0.00 891.57 891.57
ME 5 315.08 0.00 315.08 50.50 0.00 0.00 365.58 365.58
MD 16 352.95 37.59 390.54 89.37 0.00 0.00 479.91 479.91
MA 13 449.21 12.90 462.11 99.61 0.00 0.00 561.72 561.72
MI 13 1,174.00 0.00 1,174.00 66.80 0.00 5.20 1,246.00 1,240.80
MN 9 912.70 0.00 912.70 0.00 0.00 40.15 952.85 912.70
MS 6 683.20 0.00 683.20 0.00 0.00 25.20 708.40 683.20
MO 16 1,153.35 0.00 1,153.35 18.99 0.00 7.50 1,179.84 1,172.34
MT 5 1,187.54 0.00 1,187.54 0.00 0.00 7.65 1,195.19 1,187.54
NE 6 481.48 0.00 481.48 0.00 0.00 0.00 481.48 481.48
NV 4 543.44 0.00 543.44 16.11 0.00 0.00 559.55 559.55
NH 5 219.01 0.00 219.01 5.68 0.00 0.00 224.69 224.69
NJ 10 394.53 27.30 421.83 0.00 0.00 0.00 421.83 421.83
NM 3 999.90 0.00 999.90 0.00 0.00 0.00 999.90 999.90
NY 28 1,326.95 65.60 1,392.55 104.24 0.00 0.00 1,496.79 1,496.79
NC 10 847.62 0.00 847.62 127.54 56.70 38.98 1,070.84 1,031.86
ND 3 571.19 0.00 571.19 0.00 0.00 0.00 571.19 571.19
OH 21 1,530.39 0.00 1,530.39 35.00 0.00 154.05 1,719.44 1,565.39
OK 7 808.65 0.00 808.65 120.65 0.00 5.90 935.20 929.30
OR 6 720.42 0.00 720.42 6.89 0.00 0.00 727.31 727.31
PA 21 1,562.75 0.00 1,562.75 138.80 53.00 90.77 1,845.32 1,754.55
RI 3 70.82 0.00 70.82 0.00 0.00 0.00 70.82 70.82
SC 11 772.01 0.00 772.01 56.70 0.00 0.00 828.71 828.71
SD 4 678.73 0.00 678.73 0.00 0.00 0.00 678.73 678.73
TN 15 1,036.90 0.00 1,036.90 35.00 0.00 25.90 1,097.80 1,071.90
TX 17 3,162.58 0.00 3,162.58 69.46 0.00 99.34 3,331.38 3,232.04
UT 5 941.32 0.00 941.32 0.00 0.00 39.29 980.61 941.32
VT 4 320.44 0.00 320.44 0.00 0.00 0.00 320.44 320.44
VA 16 1,065.34 0.00 1,065.34 33.28 0.00 39.20 1,137.82 1,098.62
WA 7 763.85 0.00 763.85 0.00 0.00 0.00 763.85 763.85
WV 7 515.11 0.00 515.11 31.80 0.00 63.88 610.79 546.91
WI 7 578.09 0.00 578.09 167.00 0.00 0.00 745.09 745.09
WY 4 913.61 0.00 913.61 0.00 0.00 0.00 913.61 913.61
Grand Total 42,391.87 402.62 42,794.49 2,108.33 109.70 1,081.22 46,093.74 45,012.52

1- AND 2-DIGIT INTERSTATE ROUTES AND THEIR LENGTHS (IN MILES)
(As of 12/31/97)
Interstate Route Number "CHARGEABLE" MILEAGE "N0N-CHARGEABLE" MILEAGE Mileage of Other Overlapping Routes NET Length Without Overlap TOTAL Length With Overlap
Original 42,500 Miles 23 USC 103(e)(1),(3) Howard-Cramer Additions 23 USC 103(e)(2) Subtotal 103e(1),(2)(3) Miles Added Under 23 USC 139(a) High Priority Route Additions per NHS Act
I-4 132.06 --- 132.06 --- --- --- 132.06 132.06
I-5 1,382.04 --- 1,382.04 --- --- --- 1,382.04 1,382.04
I-8 348.32 --- 348.32 --- --- --- 348.32 348.32
I-10 2,455.97 --- 2,455.97 --- --- 3.99 2,455.97 2,459.96
I-12 85.59 --- 85.59 --- --- --- 85.59 85.59
I-15 1,436.89 --- 1,436.89 --- --- --- 1,436.89 1,436.89
I-16 165.41 --- 165.41 --- --- --- 165.41 165.41
I-17 145.24 --- 145.24 --- --- --- 145.24 145.24
I-19 63.35 --- 63.35 --- --- --- 63.35 63.35
I-20 1,381.01 --- 1,381.01 2.00 --- 155.30 1,383.01 1,538.31
I-24 311.22 --- 311.22 --- --- 5.30 311.22 316.52
I-25 1,061.95 --- 1,061.95 --- --- --- 1,061.95 1,061.95
I-26 260.90 --- 260.90 --- --- --- 260.90 260.90
I-27 111.48 --- 111.48 12.90 --- --- 124.38 124.38
I-29 743.76 --- 743.76 --- --- 8.50 743.76 752.26
I-30 336.78 --- 336.78 29.93 --- --- 366.71 366.71
I-35/E/W 1,694.25 --- 1,694.25 --- --- 137.18 1,694.25 1,831.43
I-37 143.06 --- 143.06 --- --- --- 143.06 143.06
I-39 --- --- 0.00 223.59 --- --- 223.59 223.59
I-40 2,422.38 --- 2,422.38 91.40 --- 40.51 2,513.78 2,554.29
I-43 119.58 --- 119.58 63.00 --- --- 182.58 182.58
I-44 500.20 --- 500.20 129.46 --- 4.37 629.66 634.03
I-45 284.99 --- 284.99 --- --- --- 284.99 284.99
I-49 34.10 153.18 187.28 19.55 --- --- 206.83 206.83
I-55 921.77 --- 921.77 --- --- 21.92 921.77 943.69
I-57 374.98 --- 374.98 --- --- 5.59 374.98 380.57
I-59 444.02 --- 444.02 --- --- --- 444.02 444.02
I-64 831.07 --- 831.07 14.70 --- 98.42 845.77 944.19
I-65 887.08 --- 887.08 --- --- 1.00 887.08 888.08
I-66 76.37 --- 76.37 --- --- --- 76.37 76.37
I-68 --- --- 0.00 112.10 --- --- 112.10 112.10
I-69 284.39 --- 284.39 66.80 --- 5.20 351.19 356.39
I-70 2,086.11 --- 2,086.11 --- --- 89.35 2,086.11 2,175.46
I-71 323.92 --- 323.92 --- --- 21.66 323.92 345.58
I-72 78.66 --- 78.66 94.00 --- --- 172.66 172.66
I-73 --- --- 0.00 --- 56.70 --- 56.70 56.70
I-74 390.40 --- 390.40 --- --- 26.49 390.40 416.89
I-75 1,714.68 46.31 1,760.99 --- --- 26.50 1,760.99 1,787.49
I-76 (1) 431.87 --- 431.87 --- --- --- 431.87 431.87
I-76 (2) 186.62 --- 186.62 --- --- --- 186.62 186.62
I-77 583.55 --- 583.55 15.30 --- 8.80 598.85 607.65
I-78 145.34 --- 145.34 --- --- --- 145.34 145.34
I-79 340.70 --- 340.70 --- --- 3.55 340.70 344.25
I-80 2,854.17 --- 2,854.17 35.00 --- 17.60 2,889.17 2,906.77
I-81 855.10 --- 855.10 --- --- --- 855.10 855.10
I-82 142.98 --- 142.98 --- --- --- 142.98 142.98
I-83 84.11 --- 84.11 --- --- --- 84.11 84.11
I-84 (3) 724.90 --- 724.90 6.89 --- 35.98 731.79 767.77
I-84 (4) 227.93 --- 227.93 --- --- --- 227.93 227.93
I-85 659.15 --- 659.15 --- --- 8.00 659.15 667.15
I-86 63.18 --- 63.18 --- --- --- 63.18 63.18
I-87 302.95 --- 302.95 29.80 --- --- 332.75 332.75
I-88 IL --- --- 0.00 140.59 --- --- 140.59 140.59
I-88 NY 117.77 --- 117.77 --- --- --- 117.77 117.77
I-89 191.32 --- 191.32 --- --- --- 191.32 191.32
I-90 2,764.22 --- 2,764.22 19.61 --- 301.44 2,783.83 3,085.27
I-91 290.52 --- 290.52 --- --- --- 290.52 290.52
I-93 174.77 --- 174.77 14.10 --- --- 188.87 188.87
I-94 1,496.15 --- 1,496.15 --- --- 18.80 1,496.15 1,514.95
I-95 1,831.14 --- 1,831.14 61.62 --- --- 1,892.76 1,892.76
I-96 192.70 --- 192.70 --- --- --- 192.70 192.70
I-97 2.67 14.90 17.57 --- --- --- 17.57 17.57
I-99 --- --- 0.00 --- 53.00 --- 53.00 53.00
H-1 26.90 --- 26.90 --- --- --- 26.90 26.90
H-2 8.23 --- 8.23 --- --- --- 8.23 8.23
H-3 16.09 --- 16.09 --- --- --- 16.09 16.09
Totals (5) 38,749.01 214.39 38,963.40 1,182.34 109.70 1,045.45 40,255.44 41,300.89
Footnotes:
(1) = I-76 in NJ, OH & PA
(2) = I-76 in CO & NE
(3) = I-84 in ID, OR & UT
(4) = I-84 in CT, MA, NY & PA
(5)  There are 66 1- and 2-digit routes, counting I-35/I-35E/I-35W as 1 route, and counting I-76, I84, and I-88 as 2 routes each.
Overlap mileage is included in the TOTAL length of each overlap route. NET lengths only include the Overlap mileage once, as assigned to the predominant route.

INTERSTATE 3-DIGIT ROUTES AND THEIR LENGTHS (IN MILES)
(As of 12/31/97)
Interstate Route Number State(s) Mileage Designated Under 103(e) Mileage Designated Under 139(a) Mileage of Other Overlapping Routes TOTAL Length With Overlap NET Length Without Overlap
105 CA 17.30 --- --- 17.30 17.30
105 OR 3.49 --- --- 3.49 3.49
110 CA 20.50 --- --- 20.50 20.50
110 FL 6.39 --- --- 6.39 6.39
110 LA 8.89 --- --- 8.89 8.89
110 MS 4.30 --- --- 4.30 4.30
110 TX 0.94 --- --- 0.94 0.94
115 MT 1.39 --- --- 1.39 1.39
124 TN 1.90 --- --- 1.90 1.90
126 SC 3.68 --- --- 3.68 3.68
129 IA, NE 3.49 --- --- 3.49 3.49
135 KS 95.74 --- --- 95.74 95.74
140 TN --- 11.20 --- 11.20 11.20
155 IL --- 32.06 --- 32.06 32.06
155 MO, TN 26.70 --- --- 26.70 26.70
164 IN 21.43 --- --- 21.43 21.43
165 AL 4.90 --- --- 4.90 4.90
170 MO 6.25 4.29 --- 10.54 10.54
172 IL --- 19.00 --- 19.00 19.00
175 FL --- 1.44 --- 1.44 1.44
176 PA 11.27 --- --- 11.27 11.27
180 IL 13.19 --- --- 13.19 13.19
180 NE 3.18 --- --- 3.18 3.18
180 PA --- 28.80 --- 28.80 28.80
180 WY 1.06 --- --- 1.06 1.06
181 TN --- 23.80 --- 23.80 23.80
182 WA 15.20 --- --- 15.20 15.20
184 ID 3.52 --- --- 3.52 3.52
185 GA 43.57 5.50 --- 49.07 49.07
185 SC 2.98 --- --- 2.98 2.98
189 VT 1.37 --- --- 1.37 1.37
190 IL --- 3.07 --- 3.07 3.07
190 MA 19.10 --- --- 19.10 19.10
190 NY 28.45 --- --- 28.45 28.45
190 SD 1.61 --- --- 1.61 1.61
194 MI 3.40 --- --- 3.40 3.40
194 ND 1.19 --- --- 1.19 1.19
195 FL 4.41 --- --- 4.41 4.41
195 MD 3.53 1.40 --- 4.93 4.93
195 ME 1.55 --- --- 1.55 1.55
195 NJ 34.30 --- --- 34.30 34.30
195 RI, MA 29.59 14.28 --- 43.87 43.87
195 VA 3.20 --- --- 3.20 3.20
196 MI 80.60 --- --- 80.60 80.60
205 CA 13.00 --- --- 13.00 13.00
205 OR, WA 37.00 --- --- 37.00 37.00
210 CA 48.60 --- --- 48.60 48.60
210 LA 12.40 --- --- 12.40 12.40
215 CA --- 54.50 --- 54.50 54.50
215 UT 29.59 --- --- 29.59 29.59
220 LA 17.60 --- --- 17.60 17.60
220 MS 11.60 --- --- 11.60 11.60
225 CO 12.18 --- --- 12.18 12.18
229 MO 14.60 --- --- 14.60 14.60
229 SD 11.63 --- --- 11.63 11.63
235 IA 13.85 --- --- 13.85 13.85
235 KS 16.53 --- --- 16.53 16.53
235 OK 3.66 1.54 --- 5.20 5.20
238 CA --- 2.10 --- 2.10 2.10
240 NC 2.22 6.92 --- 9.14 9.14
240 OK 11.87 4.35 --- 16.22 16.22
240 TN 19.00 --- --- 19.00 19.00
244 OK 15.75 --- --- 15.75 15.75
255 MO, IL 30.70 --- --- 30.70 30.70
264 KY 22.88 --- --- 22.88 22.88
264 VA 13.17 --- --- 13.17 13.17
265 KY, IN 10.01 21.20 --- 31.21 31.21
265 TN 2.25 --- --- 2.25 2.25
270 CO 5.20 --- --- 5.20 5.20
270 MD 34.52 --- --- 34.52 34.52
270 MO, IL 50.57 --- --- 50.57 50.57
270 OH 55.08 --- --- 55.08 55.08
271 OH 35.79 --- 5.84 41.63 35.79
275 FL 59.58 --- --- 59.58 59.58
275 KY, OH, IN 79.53 --- 3.45 82.98 79.53
275 MI 30.30 --- --- 30.30 30.30
275 TN 2.90 --- --- 2.90 2.90
276 PA 29.38 --- --- 29.38 29.38
277 NC 2.69 1.72 --- 4.41 4.41
277 OH 3.62 --- --- 3.62 3.62
278 NJ, NY 35.25 --- --- 35.25 35.25
279 PA 19.07 --- --- 19.07 19.07
280 CA 57.10 --- --- 57.10 57.10
280 IA, IL 17.61 --- 9.39 27.00 17.61
280 NJ 18.10 --- --- 18.10 18.10
280 OH 12.43 --- --- 12.43 12.43
283 PA 3.07 --- --- 3.07 3.07
285 GA 61.63 --- 1.21 62.84 61.63
287 NJ, NY 79.00 --- --- 79.00 79.00
290 IL 29.84 --- --- 29.84 29.84
290 MA 19.76 --- --- 19.76 19.76
290 NY 9.96 --- --- 9.96 9.96
291 CT 5.88 --- --- 5.88 5.88
291 MA 5.53 --- --- 5.53 5.53
293 NH 5.54 5.68 --- 11.22 11.22
294 IL 48.10 --- 5.32 53.42 48.10
295 DC, MD 8.50 --- --- 8.50 8.50
295 DE, NJ 83.01 --- --- 83.01 83.01
295 FL 35.06 --- --- 35.06 35.06
295 ME 10.90 --- --- 10.90 10.90
295 NY 9.00 --- --- 9.00 9.00
295 RI, MA 27.39 --- --- 27.39 27.39
295 VA 52.86 --- --- 52.86 52.86
296 MI 3.40 --- --- 3.40 3.40
305 CA 5.30 --- --- 5.30 5.30
310 LA 11.50 --- --- 11.50 11.50
315 MT 0.82 --- --- 0.82 0.82
326 SC 5.24 --- --- 5.24 5.24
335 KS --- 50.10 --- 50.10 50.10
345 TX 1.26 --- --- 1.26 1.26
355 IL --- 20.01 --- 20.01 20.01
359 AL 2.30 --- --- 2.30 2.30
370 MD 2.67 --- --- 2.67 2.67
375 FL --- 1.34 --- 1.34 1.34
375 MI 1.10 --- --- 1.10 1.10
376 PA 14.69 --- --- 14.69 14.69
380 CA 3.30 --- --- 3.30 3.30
380 IA 73.12 --- --- 73.12 73.12
380 PA 28.30 --- --- 28.30 28.30
381 VA 1.17 --- --- 1.17 1.17
384 CT 7.40 --- --- 7.40 7.40
385 SC 6.21 36.00 --- 42.21 42.21
390 NY 74.90 --- --- 74.90 74.90
391 MA 4.68 --- --- 4.68 4.68
393 NH 4.60 --- --- 4.60 4.60
394 MN 10.03 --- --- 10.03 10.03
395 CT --- 54.69 --- 54.69 54.69
395 FL 1.21 --- --- 1.21 1.21
395 MA --- 12.29 --- 12.29 12.29
395 MD 0.72 --- --- 0.72 0.72
395 ME 4.74 --- --- 4.74 4.74
395 VA, DC 13.08 --- --- 13.08 13.08
405 CA 72.40 --- --- 72.40 72.40
405 OR 3.39 --- --- 3.39 3.39
405 WA 30.33 --- --- 30.33 30.33
410 TX 39.23 9.93 --- 49.16 49.16
430 AR 12.93 --- --- 12.93 12.93
435 KS, MO 78.43 --- --- 78.43 78.43
440 AR --- 9.96 --- 9.96 9.96
440 NC --- 16.70 --- 16.70 16.70
440 TN 7.50 --- --- 7.50 7.50
444 OK 2.51 --- --- 2.51 2.51
459 AL 32.80 --- --- 32.80 32.80
464 VA 5.71 --- --- 5.71 5.71
465 IN 53.14 5.03 --- 58.17 58.17
469 IN --- 29.60 --- 29.60 29.60
470 KS 11.45 --- --- 11.45 11.45
470 MO 16.50 --- --- 16.50 16.50
470 OH, WV 10.35 --- --- 10.35 10.35
471 KY, OH 5.34 --- --- 5.34 5.34
474 IL 14.88 --- --- 14.88 14.88
475 GA 15.59 --- --- 15.59 15.59
475 MI 16.80 --- --- 16.80 16.80
475 OH 19.92 --- --- 19.92 19.92
476 PA 21.25 110.00 --- 131.25 131.25
478 NY --- 1.90 --- 1.90 1.90
480 NE, IA 4.79 --- --- 4.79 4.79
480 OH 42.88 --- --- 42.88 42.88
481 NY 14.99 --- --- 14.99 14.99
490 NY 37.97 --- --- 37.97 37.97
490 OH 1.71 --- --- 1.71 1.71
494 MN 42.73 --- --- 42.73 42.73
495 DE 11.47 --- --- 11.47 11.47
495 MA 101.43 18.50 --- 119.93 119.93
495 ME --- 50.50 --- 50.50 50.50
495 NY 3.60 62.70 --- 66.30 66.30
495 VA, MD 29.65 --- --- 29.65 29.65
496 MI 11.80 --- --- 11.80 11.80
505 CA 32.90 --- --- 32.90 32.90
510 LA 3.16 --- --- 3.16 3.16
515 NV 6.00 14.90 --- 20.90 20.90
516 GA --- 6.40 --- 6.40 6.40
520 GA 10.11 --- --- 10.11 10.11
526 SC 8.98 11.20 --- 20.18 20.18
535 MN, WI 2.79 --- --- 2.79 2.79
540 AR 8.13 5.97 --- 14.10 14.10
540 NC --- 5.00 --- 5.00 5.00
564 VA 2.94 --- --- 2.94 2.94
565 AL 21.40 --- --- 21.40 21.40
575 GA 30.86 --- --- 30.86 30.86
579 PA 1.30 --- --- 1.30 1.30
580 CA 68.40 7.30 --- 75.70 75.70
580 NV 3.00 1.21 --- 4.21 4.21
581 VA 6.40 --- --- 6.40 6.40
585 SC 2.25 --- --- 2.25 2.25
587 NY 1.40 --- --- 1.40 1.40
590 NY 5.10 --- --- 5.10 5.10
595 FL 4.20 8.80 --- 13.00 13.00
595 MD 20.11 --- --- 20.11 20.11
605 CA 27.40 --- --- 27.40 27.40
610 LA 4.02 --- --- 4.02 4.02
610 TX 38.01 --- --- 38.01 38.01
630 AR 7.40 --- --- 7.40 7.40
635 KS, MO 12.60 --- --- 12.60 12.60
635 TX 36.94 --- --- 36.94 36.94
640 TN 7.10 --- --- 7.10 7.10
664 VA 10.77 9.20 --- 19.97 19.97
670 KS, MO 1.44 --- --- 1.44 1.44
670 OH 10.68 --- --- 10.68 10.68
675 GA 10.25 --- --- 10.25 10.25
675 MI 7.80 --- --- 7.80 7.80
675 OH 25.91 --- --- 25.91 25.91
676 PA, NJ 7.19 --- --- 7.19 7.19
678 NY 6.30 7.80 --- 14.10 14.10
680 CA 58.00 12.50 --- 70.50 70.50
680 NE, IA 32.97 --- 9.91 42.88 32.97
680 OH 16.65 --- --- 16.65 16.65
684 NY, CT 28.00 --- --- 28.00 28.00
690 NY 14.60 --- --- 14.60 14.60
691 CT 8.29 --- --- 8.29 8.29
694 MN 21.98 --- 0.65 22.63 21.98
695 DC 1.21 --- --- 1.21 1.21
695 MD 28.58 2.20 --- 30.78 30.78
696 MI 28.20 --- --- 28.20 28.20
705 WA 1.50 --- --- 1.50 1.50
710 CA --- 19.70 --- 19.70 19.70
759 AL 4.50 --- --- 4.50 4.50
780 CA 6.50 --- --- 6.50 6.50
787 NY 10.50 --- --- 10.50 10.50
790 NY 2.55 --- --- 2.55 2.55
794 WI 3.75 --- --- 3.75 3.75
795 MD 4.05 5.47 --- 9.52 9.52
805 CA 28.00 --- --- 28.00 28.00
820 TX 34.75 --- --- 34.75 34.75
878 NY 0.70 --- --- 0.70 0.70
880 CA --- 44.70 --- 44.70 44.70
890 NY 8.90 --- --- 8.90 8.90
894 WI 10.02 --- --- 10.02 10.02
895 MD 15.00 --- --- 15.00 15.00
895 NY 1.10 --- --- 1.10 1.10
980 CA 0.80 1.00 --- 1.80 1.80
985 GA --- 24.40 --- 24.40 24.40
990 NY 4.14 2.04 --- 6.18 6.18
H-201 HI --- 4.10 --- 4.10 4.10
Totals 234 Routes 3,831.09 925.99 35.77 4,792.85 4,757.08
Footnotes:
- 103(e) refers to routes designated under Sections 103(e)(1), (2) & (3) of Title 23 U.S.C. Code.
- 139(a) refers to routes designated under Section 139(a) of Title 23 U.S.C. Code.
- Overlap mileage is included in the Total Length of each overlap route.
- NET Mileages only include the overlap mileage once, as assigned by the State to the predominant route.

INTERSTATE LOOPS AND THEIR LENGTHS (IN MILES)
(As of 12/31/97)
Interstate Route Number State(s) Mileage Designated Under 103(e) Mileage Designated Under 139(a) Mileage of Other Overlapping Routes TOTAL Length With Overlap NET Length Without Overlap
205 CA 13.00 --- --- 13.00 13.00
205 OR, WA 37.00 --- --- 37.00 37.00
210 CA 48.60 --- --- 48.60 48.60
210 LA 12.40 --- --- 12.40 12.40
215 CA --- 54.50 --- 54.50 54.50
215 UT 29.59 --- --- 29.59 29.59
220 LA 17.60 --- --- 17.60 17.60
220 MS 11.60 --- --- 11.60 11.60
225 CO 12.18 --- --- 12.18 12.18
229 MO 14.60 --- --- 14.60 14.60
229 SD 11.63 --- --- 11.63 11.63
235 IA 13.85 --- --- 13.85 13.85
235 KS 16.53 --- --- 16.53 16.53
235 OK 3.66 1.54 --- 5.20 5.20
238 CA --- 2.10 --- 2.10 2.10
240 NC 2.22 6.92 --- 9.14 9.14
240 OK 11.87 4.35 --- 16.22 16.22
240 TN 19.00 --- --- 19.00 19.00
244 OK 15.75 --- --- 15.75 15.75
255 MO, IL 30.70 --- --- 30.70 30.70
264 KY 22.88 --- --- 22.88 22.88
264 VA 13.17 --- --- 13.17 13.17
265 KY, IN 10.01 21.20 --- 31.21 31.21
265 TN 2.25 --- --- 2.25 2.25
270 CO 5.20 --- --- 5.20 5.20
270 MD 34.52 --- --- 34.52 34.52
270 MO, IL 50.57 --- --- 50.57 50.57
270 OH 55.08 --- --- 55.08 55.08
271 OH 35.79 --- 5.84 41.63 35.79
275 FL 59.58 --- --- 59.58 59.58
275 KY, OH, IN 79.53 --- 3.45 82.98 79.53
275 MI 30.30 --- --- 30.30 30.30
275 TN 2.90 --- --- 2.90 2.90
276 PA 29.38 --- --- 29.38 29.38
277 NC 2.69 1.72 --- 4.41 4.41
277 OH 3.62 --- --- 3.62 3.62
278 NJ, NY 35.25 --- --- 35.25 35.25
279 PA 19.07 --- --- 19.07 19.07
280 CA 57.10 --- --- 57.10 57.10
280 IA, IL 17.61 --- 9.39 27.00 17.61
280 NJ 18.10 --- --- 18.10 18.10
280 OH 12.43 --- --- 12.43 12.43
283 PA 3.07 --- --- 3.07 3.07
285 GA 61.63 --- 1.21 62.84 61.63
287 NJ, NY 79.00 --- --- 79.00 79.00
290 IL 29.84 --- --- 29.84 29.84
290 MA 19.76 --- --- 19.76 19.76
290 NY 9.96 --- --- 9.96 9.96
291 CT 5.88 --- --- 5.88 5.88
291 MA 5.53 --- --- 5.53 5.53
293 NH 5.54 5.68 --- 11.22 11.22
294 IL 48.10 --- 5.32 53.42 48.10
295 DC, MD 8.50 --- --- 8.50 8.50
295 DE, NJ 83.01 --- --- 83.01 83.01
295 FL 35.06 --- --- 35.06 35.06
295 ME 10.90 --- --- 10.90 10.90
295 NY 9.00 --- --- 9.00 9.00
295 RI, MA 27.39 --- --- 27.39 27.39
295 VA 52.86 --- --- 52.86 52.86
296 MI 3.40 --- --- 3.40 3.40
405 CA 72.40 --- --- 72.40 72.40
405 OR 3.39 --- --- 3.39 3.39
405 WA 30.33 --- --- 30.33 30.33
410 TX 39.23 9.93 --- 49.16 49.16
430 AR 12.93 --- --- 12.93 12.93
435 KS, MO 78.43 --- --- 78.43 78.43
440 AR --- 9.96 --- 9.96 9.96
440 NC --- 16.70 --- 16.70 16.70
440 TN 7.50 --- --- 7.50 7.50
444 OK 2.51 --- --- 2.51 2.51
459 AL 32.80 --- --- 32.80 32.80
464 VA 5.71 --- --- 5.71 5.71
465 IN 53.14 5.03 --- 58.17 58.17
469 IN --- 29.60 --- 29.60 29.60
470 KS 11.45 --- --- 11.45 11.45
470 MO 16.50 --- --- 16.50 16.50
470 OH, WV 10.35 --- --- 10.35 10.35
471 KY, OH 5.34 --- --- 5.34 5.34
474 IL 14.88 --- --- 14.88 14.88
475 GA 15.59 --- --- 15.59 15.59
475 MI 16.80 --- --- 16.80 16.80
475 OH 19.92 --- --- 19.92 19.92
476 PA 21.25 110.00 --- 131.25 131.25
478 NY --- 1.90 --- 1.90 1.90
480 NE, IA 4.79 --- --- 4.79 4.79
480 OH 42.88 --- --- 42.88 42.88
481 NY 14.99 --- --- 14.99 14.99
490 NY 37.97 --- --- 37.97 37.97
490 OH 1.71 --- --- 1.71 1.71
494 MN 42.73 --- --- 42.73 42.73
495 DE 11.47 --- --- 11.47 11.47
495 MA 101.43 18.50 --- 119.93 119.93
495 ME --- 50.50 --- 50.50 50.50
495 NY 3.60 62.70 --- 66.30 66.30
495 VA, MD 29.65 --- --- 29.65 29.65
496 MI 11.80 --- --- 11.80 11.80
605 CA 27.40 --- --- 27.40 27.40
610 LA 4.02 --- --- 4.02 4.02
610 TX 38.01 --- --- 38.01 38.01
630 AR 7.40 --- --- 7.40 7.40
635 KS, MO 12.60 --- --- 12.60 12.60
635 TX 36.94 --- --- 36.94 36.94
640 TN 7.10 --- --- 7.10 7.10
664 VA 10.77 9.20 --- 19.97 19.97
670 KS, MO 1.44 --- --- 1.44 1.44
670 OH 10.68 --- --- 10.68 10.68
675 GA 10.25 --- --- 10.25 10.25
675 MI 7.80 --- --- 7.80 7.80
675 OH 25.91 --- --- 25.91 25.91
676 PA, NJ 7.19 --- --- 7.19 7.19
678 NY 6.30 7.80 --- 14.10 14.10
680 CA 58.00 12.50 --- 70.50 70.50
680 NE, IA 32.97 --- 9.91 42.88 32.97
680 OH 16.65 --- --- 16.65 16.65
684 NY, CT 28.00 --- --- 28.00 28.00
690 NY 14.60 --- --- 14.60 14.60
691 CT 8.29 --- --- 8.29 8.29
694 MN 21.98 --- 0.65 22.63 21.98
695 DC 1.21 --- --- 1.21 1.21
695 MD 28.58 2.20 --- 30.78 30.78
696 MI 28.20 --- --- 28.20 28.20
805 CA 28.00 --- --- 28.00 28.00
820 TX 34.75 --- --- 34.75 34.75
878 NY 0.70 --- --- 0.70 0.70
880 CA --- 44.70 --- 44.70 44.70
890 NY 8.90 --- --- 8.90 8.90
894 WI 10.02 --- --- 10.02 10.02
895 MD 15.00 --- --- 15.00 15.00
895 NY 1.10 --- --- 1.10 1.10
H-201 HI --- 4.10 --- 4.10 4.10
Totals 130 Loops 2,741.47 493.33 35.77 3,270.57 3,234.80
Footnotes:
- 103(e) refers to routes designated under Sections 103(e)(1), (2) & (3) of Title 23 U.S.C. Code.
- 139(a) refers to routes designated under Section 139(a) of Title 23 U.S.C. Code.
- Overlap mileage is included in the Total Length of each overlap route.
- NET Mileages only include the overlap mileage once, as assigned by the State to the predominant route.

INTERSTATE SPURS AND THEIR LENGTHS (IN MILES)
(As of 12/31/97)
Interstate Route Number State(s) Mileage Designated Under 103(e) Mileage Designated Under 139(a) Mileage of Other Overlapping Routes TOTAL Length With Overlap NET Length Without Overlap
105 CA 17.30 --- --- 17.30 17.30
105 OR 3.49 --- --- 3.49 3.49
110 CA 20.50 --- --- 20.50 20.50
110 FL 6.39 --- --- 6.39 6.39
110 LA 8.89 --- --- 8.89 8.89
110 MS 4.30 --- --- 4.30 4.30
110 TX 0.94 --- --- 0.94 0.94
115 MT 1.39 --- --- 1.39 1.39
124 TN 1.90 --- --- 1.90 1.90
126 SC 3.68 --- --- 3.68 3.68
129 IA, NE 3.49 --- --- 3.49 3.49
135 KS 95.74 --- --- 95.74 95.74
140 TN --- 11.20 --- 11.20 11.20
155 IL --- 32.06 --- 32.06 32.06
155 MO, TN 26.70 --- --- 26.70 26.70
164 IN 21.43 --- --- 21.43 21.43
165 AL 4.90 --- --- 4.90 4.90
170 MO 6.25 4.29 --- 10.54 10.54
172 IL --- 19.00 --- 19.00 19.00
175 FL --- 1.44 --- 1.44 1.44
176 PA 11.27 --- --- 11.27 11.27
180 IL 13.19 --- --- 13.19 13.19
180 NE 3.18 --- --- 3.18 3.18
180 PA --- 28.80 --- 28.80 28.80
180 WY 1.06 --- --- 1.06 1.06
181 TN --- 23.80 --- 23.80 23.80
182 WA 15.20 --- --- 15.20 15.20
184 ID 3.52 --- --- 3.52 3.52
185 GA 43.57 5.50 --- 49.07 49.07
185 SC 2.98 --- --- 2.98 2.98
189 VT 1.37 --- --- 1.37 1.37
190 IL --- 3.07 --- 3.07 3.07
190 MA 19.10 --- --- 19.10 19.10
190 NY 28.45 --- --- 28.45 28.45
190 SD 1.61 --- --- 1.61 1.61
194 MI 3.40 --- --- 3.40 3.40
194 ND 1.19 --- --- 1.19 1.19
195 FL 4.41 --- --- 4.41 4.41
195 MD 3.53 1.40 --- 4.93 4.93
195 ME 1.55 --- --- 1.55 1.55
195 NJ 34.30 --- --- 34.30 34.30
195 RI, MA 29.59 14.28 --- 43.87 43.87
195 VA 3.20 --- --- 3.20 3.20
196 MI 80.60 --- --- 80.60 80.60
305 CA 5.30 --- --- 5.30 5.30
310 LA 11.50 --- --- 11.50 11.50
315 MT 0.82 --- --- 0.82 0.82
326 SC 5.24 --- --- 5.24 5.24
335 KS --- 50.10 --- 50.10 50.10
345 TX 1.26 --- --- 1.26 1.26
355 IL --- 20.01 --- 20.01 20.01
359 AL 2.30 --- --- 2.30 2.30
370 MD 2.67 --- --- 2.67 2.67
375 FL --- 1.34 --- 1.34 1.34
375 MI 1.10 --- --- 1.10 1.10
376 PA 14.69 --- --- 14.69 14.69
380 CA 3.30 --- --- 3.30 3.30
380 IA 73.12 --- --- 73.12 73.12
380 PA 28.30 --- --- 28.30 28.30
381 VA 1.17 --- --- 1.17 1.17
384 CT 7.40 --- --- 7.40 7.40
385 SC 6.21 36.00 --- 42.21 42.21
390 NY 74.90 --- --- 74.90 74.90
391 MA 4.68 --- --- 4.68 4.68
393 NH 4.60 --- --- 4.60 4.60
394 MN 10.03 --- --- 10.03 10.03
395 CT --- 54.69 --- 54.69 54.69
395 FL 1.21 --- --- 1.21 1.21
395 MA --- 12.29 --- 12.29 12.29
395 MD 0.72 --- --- 0.72 0.72
395 ME 4.74 --- --- 4.74 4.74
395 VA, DC 13.08 --- --- 13.08 13.08
505 CA 32.90 --- --- 32.90 32.90
510 LA 3.16 --- --- 3.16 3.16
515 NV 6.00 14.90 --- 20.90 20.90
516 GA --- 6.40 --- 6.40 6.40
520 GA 10.11 --- --- 10.11 10.11
526 SC 8.98 11.20 --- 20.18 20.18
535 MN, WI 2.79 --- --- 2.79 2.79
540 AR 8.13 5.97 --- 14.10 14.10
540 NC --- 5.00 --- 5.00 5.00
564 VA 2.94 --- --- 2.94 2.94
565 AL 21.40 --- --- 21.40 21.40
575 GA 30.86 --- --- 30.86 30.86
579 PA 1.30 --- --- 1.30 1.30
580 CA 68.40 7.30 --- 75.70 75.70
580 NV 3.00 1.21 --- 4.21 4.21
581 VA 6.40 --- --- 6.40 6.40
585 SC 2.25 --- --- 2.25 2.25
587 NY 1.40 --- --- 1.40 1.40
590 NY 5.10 --- --- 5.10 5.10
595 FL 4.20 8.80 --- 13.00 13.00
595 MD 20.11 --- --- 20.11 20.11
705 WA 1.50 --- --- 1.50 1.50
710 CA --- 19.70 --- 19.70 19.70
759 AL 4.50 --- --- 4.50 4.50
780 CA 6.50 --- --- 6.50 6.50
787 NY 10.50 --- --- 10.50 10.50
790 NY 2.55 --- --- 2.55 2.55
794 WI 3.75 --- --- 3.75 3.75
795 MD 4.05 5.47 --- 9.52 9.52
980 CA 0.80 1.00 --- 1.80 1.80
985 GA --- 24.40 --- 24.40 24.40
990 NY 4.14 2.04 --- 6.18 6.18
Totals 104 Spurs 1,089.62 432.66 0.00 1,522.28 1,522.28
Footnotes:
- 103(e) refers to routes designated under Sections 103(e)(1), (2) & (3) of Title 23 U.S.C. Code.
- 139(a) refers to routes designated under 23 U.S.C. 139(a).
- There are no other Interstate routes which overlap Interstate spur routes.



Interstate System Mileage By Urbanized Area
1 New York - Northeastern New Jersey 460
2 Chicago - Northwestern Indiana 422
3 Los Angeles 373
4 Dallas - Fort Worth 286
5 St. Louis 245
6 Atlanta 238
7 Detroit 203
8 San Francisco - Oakland 202
9 Kansas City 201
10 Minneapolis - St. Paul 194
11 Philadelphia 190
12 Cleveland 176
13 Washington, DC (MD, VA) 170
14 Pittsburgh 166
Note: Urbanized areas with at least 150 centerline miles on the Dwight D. Eisenhower System of Interstate and Defense Highways
Source: FHWA's 1996 Highway Statistics Table HM-71, pages V-80 thru V-85.