Because of the size and weight of a truck, it generally takes much longer to slow or steer a truck than it does a car. For instance, sources say that total stopping distance for a truck when taking into account a driver’s perception, reaction and braking, can be as much as 419 feet.
When a trucker is driving at night, the danger is futher enhanced because the low beam headlights of some trucks illuminate only around 200 feet in front of the driver. This results in a distance of 219 feet that is unaccounted for.
For these reasons, truck drivers are trained to take this difference between their stopping distance and the limitations of their headlights into account and are taught to never “overdrive their headlights.”