The total stopping distance for a vehicle with air brakes is made up of:
a.Perception distance + reaction distance + brake lag distance + braking distance
b.Reaction distance + braking distance only
c.Perception distance + braking distance only
d.Brake lag distance + braking distance only
Explanation
Total stopping distance for air brake vehicles includes four components: perception distance (time to see the hazard), reaction distance (time to move your foot to the brake), brake lag distance (time for air to reach the brakes), and braking distance (time for the vehicle to stop once brakes are working).