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Road Safety Fundamentals
Concepts, Strategies, and Practices that Reduce Fatalities and Injuries on the Road

U.S. Department of Transportation, Federal Highway Administration

UNIT 4. Solving Safety Problems

Table 4-6: Haddon Matrix for crashes in an urban area (Source: HSIP Manual)
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Table 4-6. Haddon Matrix for crashes in an urban area (Source: HSIP Manual)
Period Human Vehicle / Equipment Physical Environment Socioeconomic
Pre-Crash Poor vision or reaction time, alcohol, speeding, risk taking Failed brakes, missing lights, lack of warning systems Narrow shoulders, ill-timed signals Cultural norms permitting speeding, red light running, DUI
Crash Failure to use occupant restraints Malfunctioning safety belts, poorly engineered air bags Poorly designed guardrails Lack of vehicle design regulations
Post-Crash High susceptibility, alcohol Poorly designed fuel tanks Poor emergency communication systems Lack of support for EMS and trauma systems

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Contacts

RSPCB Program Point of Contact
Felix Delgado, FHWA Office of Safety
Felix.Delgado@dot.gov
FHWA Office of Safety

Staff and Primary Work Responsibilities
FHWA Office of Safety

Safety and Design Team
FHWA Resource Center