Abbreviations and Acronyms

AAAFTS: American Automobile Association Foundation for Traffic Safety
AADT: annual average daily traffic
AASHTO: American Association of State and Highway Transportation Officials
ASTM: American Society for Testing and Materials
ATSSA: American Traffic Safety Services Association
cd: candela
CIE: Commission Internationale de l'Eclairage
CIL: complete interchange lighting
CMS: changeable message sign
CSSB: concrete safety-shaped barrier
DS: diverge steering
DSD: decision sight distance
FARS: Fatality Analysis Reporting System
FHWA: Federal Highway Administration
fL: footlambert
GSA: gap search and acceptance
IA: initial acceleration
IIHS: Insurance Institute for Highway Safety
ISD: intersection sight distance
ISBL: in-service brightness level
ISTEA: Intermodal Surface Transportation Efficiency Act
ITE: Institute of Transportation Engineers
LI: legibility index
LPI: leading pedestrian interval
MOE: measure of effectiveness
MRVD: minimum required visibility distance
MSC: merge steering control
MUTCD: Manual on Uniform Traffic Control Devices for Streets and Highways
NCHRP: National Cooperative Highway Research Program
NHTSA: National Highway Traffic Safety Administration
NTOR: no turn on red
NTSB: National Transportation Safety Board
PIL: partial interchange lighting
PMD: post-mounted delineator
PRT: perception-reaction time
RT: reaction time
RPM: raised pavement markers
RTOR: right turn on red
SC: steering control
SCL: speed-change lane
SSD: stopping sight distance
STV: small target visibility
SU: single unit (truck)
TCD: traffic control device
TRB: Transportation Research Board
TVA: transient visual adaptation
TWLTL: two-way, left-turn lane
VC: visual clear

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Abbreviations and Acronyms