What are the three elements of the Highway Safety Matrix?

What are the three elements of the Highway Safety Matrix?

• A. Driver, Roadway, Vehicle
• B. Human, Roadway, Vehicle
• C. Person, Road, Car
• D. Pedestrian, Vehicle, Environment

Answer: (B)

Highway safety is analyzed by looking at three interacting elements: Human, Roadway, and Vehicle. The Human factor covers driver behavior, perception, decision-making, reaction time, and any impairment. The Roadway factor includes the driving environment: road design and geometry, surface conditions, signage, lighting, weather effects, and traffic controls. The Vehicle factor encompasses maintenance, mechanical condition, and safety features. Crashes arise when risk in any of these areas is high or when their interactions create unsafe conditions. Framing safety around these three elements helps identify where improvements will most effectively reduce risk, whether through better driver training and behavior change, improved road design and maintenance, or enhanced vehicle safety and reliability. Other phrasings like Environment or Car/Driver are less precise within this standard framework, which is why the established answer uses Human, Roadway, and Vehicle.

Highway safety is analyzed by looking at three interacting elements: Human, Roadway, and Vehicle. The Human factor covers driver behavior, perception, decision-making, reaction time, and any impairment. The Roadway factor includes the driving environment: road design and geometry, surface conditions, signage, lighting, weather effects, and traffic controls. The Vehicle factor encompasses maintenance, mechanical condition, and safety features. Crashes arise when risk in any of these areas is high or when their interactions create unsafe conditions. Framing safety around these three elements helps identify where improvements will most effectively reduce risk, whether through better driver training and behavior change, improved road design and maintenance, or enhanced vehicle safety and reliability. Other phrasings like Environment or Car/Driver are less precise within this standard framework, which is why the established answer uses Human, Roadway, and Vehicle.