| 4E's | Enforcement, Education, Emergency Response, and Engineering |
| AASHTO | American Association of State Highway and Transportation Officials |
| AHSO | Alaska Highway Safety Offices |
| AOC | Association of Oregon Counties |
| ARTS | All-Roads Transportation Safety |
| ATSC | Alaska Traffic Safety Corridor |
| B/C | Benefit/Cost |
| BSE | Bureau of Safety Engineering |
| CEA | Critical Emphasis Area |
| CEI | Cost-Effective Index |
| CMF | Crash Modification Factor |
| CPM | Crash Prediction Model |
| CRF | Crash Reduction Factor |
| CRS | Condition Rating Survey |
| CUUATS | Champaign-Urbana Urbanized Area Transportation Study |
| DMV | Department of Motor Vehicles |
| DOH | Department of Health |
| DOT | Department of Transportation |
| DOT&PF | Department of Transportation & Public Facilities |
| DPS | Department of Public Safety |
| DSC | District Safety Committee |
| DTS | Department of Traffic Safety |
| DTZ | Driving Toward Zero |
| EPDO | Equivalent Property Damage Only |
| FHWA | Federal Highway Administration |
| FMCSA | Federal Motor Carrier Safety Administration |
| GHSO | Governor's Highway Safety Office |
| GHSP | Governor's Highway Safety Program |
| HSIP | Highway Safety Improvement Program |
| HSM | Highway Safety Manual |
| HSP | Highway Safety Plan |
| ICWS | Intersection Cross-Road Warning System |
| IDOT | Illinois Department of Transportation |
| IRI | International Roughness Index |
| ISP | Illinois State Police |
| LOC | League of Oregon Cities |
| LPA | Local Public Agency |
| LSA | Limited Service Agreement |
| M&S | Mobility and Safety |
| M&SFO | Mobility and Safety Field Operations |
| MassDOT | Massachusetts Department of Transportation |
| MCDOT | McHenry County Department of Transportation |
| MCR | Mobile Capture Reporting |
| MPO | Metropolitan Planning Organization |
| NCDOT | North Carolina Department of Transportation |
| NCHRP | National Cooperative Highway Research Program |
| NHDOT | New Hampshire Department of Transportation |
| NHSP | New Hampshire State Police |
| NHTSA | National Highway Traffic Safety Administration |
| ODOT | Oregon Department of Transportation |
| PH | Potentially Hazardous |
| PSI | Potential for Safety Improvement |
| RMV | Registry of Motor Vehicles |
| ROW | Right of Way |
| RPC | Regional Planning Commission |
| RSA | Road Safety Audit |
| RTE | Regional Traffic Engineer |
| SAFETEA-LU | Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users |
| SHSP | Strategic Highway Safety Plan |
| SPF | Safety Performance Function |
| SRI | Safer Roads Index |
| STIP | State Transportation Improvement Program |
| T&S | Traffic & Safety |
| TESS | Traffic Engineering and Safety Section |
| TIP | Transportation Improvement Plan |
| TSAP | Transportation Safety Action Plan |
| TSD | Transportation Safety Division |
| UDOT | Utah Department of Transportation |
| UNC-HSRC | University of North Carolina Highway Safety Research Center |
| USDOT | United States Department of Transportation |
| usRAP | United States Road Assessment Program |
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