Table 4. Number and Cost of 2015 Projects by Improvement Category
| Improvement Category | Number of Projects | Total Cost of Projects* | Average Total Cost* | Total HSIP Cost of Projects* | Average HSIP Cost* |
|---|---|---|---|---|---|
| Access management | 64 | $40,528,952.04 | $723,731.29 | $43,820,608.90 | $782,510.87 |
| Advanced technology and ITS | 40 | $104,337,881.88 | $2,819,942.75 | $21,676,809.06 | $699,251.91 |
| Alignment | 66 | $74,415,999.67 | $1,240,266.66 | $52,703,937.74 | $908,688.58 |
| Animal-related | 3 | $22,423,847.00 | $7,474,615.67 | $9,815,366.00 | $3,271,788.67 |
| Interchange design | 36 | $267,466,790.51 | $7,866,670.31 | $110,179,816.68 | $3,240,582.84 |
| Intersection geometry | 559 | $521,462,049.51 | $971,065.27 | $311,611,586.04 | $566,566.52 |
| Intersection traffic control | 615 | $445,310,601.00 | $788,160.36 | $350,232,639.22 | $597,666.62 |
| Lighting | 63 | $32,132,297.78 | $526,758.98 | $30,009,274.67 | $526,478.50 |
| Miscellaneous | 72 | $67,917,652.19 | $998,789.00 | $17,981,980.86 | $599,399.36 |
| Multiple | 12 | $2,280,825.00 | $190,068.75 | $833,340.00 | $208,335.00 |
| Non-infrastructure | 199 | $112,952,571.71 | $607,271.89 | $95,718,526.59 | $493,394.47 |
| Parking | 1 | $1,424,765.00 | $1,424,765.00 | $1,424,765.00 | $1,424,765.00 |
| Pedestrians and bicyclists | 122 | $99,417,076.01 | $965,214.33 | $48,584,902.61 | $418,835.37 |
| Railroad grade crossings | 18 | $28,426,496.30 | $1,672,146.84 | $22,700,086.54 | $1,261,115.92 |
| Roadside | 422 | $349,950,365.79 | $892,730.52 | $298,650,865.15 | $716,189.13 |
| Roadway | 1195 | $712,767,937.40 | $607,645.30 | $463,639,845.73 | $391,257.25 |
| Roadway delineation | 144 | $280,307,471.56 | $2,031,213.56 | $109,105,264.21 | $796,388.79 |
| Roadway signs and traffic control | 189 | $88,807,042.13 | $519,339.43 | $64,606,657.80 | $353,041.85 |
| Shoulder treatments | 237 | $499,004,257.48 | $2,123,422.37 | $334,512,488.38 | $1,448,106.01 |
| Speed management | 6 | $1,510,300.00 | $377,575.00 | $2,483,982.00 | $413,997.00 |
| Work Zone | 19 | $4,165,365.44 | $219,229.76 | $3,847,445.25 | $202,497.12 |
| Unknown | 106 | $138,995,874.00 | $1,336,498.79 | ||
| Total | 4188 | $3,896,006,419.40 | $979,880.89 | $2,394,140,188.43 | $611,373.90 |
* Not all states provided cost data for all projects in a given improvement category.
Table 5. Number and Cost of Projects by Subcategory for Intersection Geometry
| Subcategory | Number of Projects | Total Cost |
|---|---|---|
| Auxiliary lanes – add left-turn lane | 155 | $165,468,986 |
| Auxiliary lanes – add right-turn lane | 31 | $21,363,499 |
| Auxiliary lanes – other | 72 | $99,717,888 |
| Intersection geometrics – modify skew angle | 39 | $16,148,729 |
| Intersection geometrics – other/unknown | 254 | $203,770,258 |
| Intersection geometrics – realignment to improve offset | 8 | $14,992,689 |
| Total | 559 | $521,462,050 |
Table 6. Number and Cost of Projects by Subcategory for Intersection Traffic Control
| Subcategory | Number of Projects | Total Cost |
|---|---|---|
| Intersection flashers and signing | 58 | $7,175,853 |
| Intersection traffic control - other/unknown | 231 | $129,749,953 |
| Modify control to roundabout | 91 | $102,780,501 |
| Modify traffic signal | 179 | $154,515,079 |
| Modify traffic signal timing or phasing | 45 | $48,597,313 |
| Pavement markings | 11 | $2,491,902 |
| Total | 615 | $445,310,601 |
Table 7. Number and Cost of Projects by Subcategory for Pedestrians and Bicyclists
| Subcategory | Number of Projects | Total Cost |
|---|---|---|
| Install or modify crosswalk | 18 | $9,289,768 |
| Install or modify pedestrian signal | 31 | $14,164,927 |
| Install sidewalk | 24 | $54,786,678 |
| Miscellaneous pedestrian and bicyclist improvements | 49 | $21,175,704 |
| Total | 122 | $99,417,076 |
Table 8. Number and Cost of Projects by Subcategory for Roadway
| Subcategory | Number of Projects | Total Cost |
|---|---|---|
| Pavement surface | 114 | $120,969,982 |
| Roadway – other/unknown | 553 | $156,031,786 |
| Roadway narrowing (road diet, roadway reconfiguration) | 9 | $7,738,933 |
| Roadway widening | 71 | $256,105,550 |
| Rumble strips | 427 | $157,962,412 |
| Superelevation / cross slope | 21 | $13,959,276 |
| Total | 1195 | $712,767,937 |
Table 9. Number and Cost of Projects by Subcategory for Non-Infrastructure
| Subcategory | Number of Projects | Total Cost |
|---|---|---|
| Data/traffic records | 59 | $22,819,393 |
| Educational efforts/outreach | 33 | $19,976,497 |
| Enforcement | 14 | $10,658,935 |
| Non-infrastructure – other/unknown | 14 | $5,856,916 |
| Road safety audits | 29 | $11,441,768 |
| Training and workforce development | 6 | $2,081,385 |
| Transportation safety planning | 44 | $40,117,677 |
| Total | 199 | $112,952,571.71 |