Reaction Time Lab

very very short

many car lengths

3x

6x

9x

property damage or bodily harm

nothing

no damage to the car

no harm to the occupants of the car

Keep one car length between vehicles for every 10mph

Stay 12 inches from the vehicle in front of you

Drive faster under icy or wet conditions

If you are driving faster, keep a shorter distance between cars

A. Trucks have greater mass, so reducing their speed lowers their kinetic energy and decreases stopping distance and crash severity.

B. Lower speed limits help limit the kinetic energy of heavy trucks, reducing wear on road surfaces and bridges.

C. Because trucks carry more kinetic energy at high speeds, slower limits help improve stability and reduce the chance of rollovers.

All answer choices are correct