Final answer:
While the exact standards for vehicle braking distances depend on specific regulations, generally passenger vehicles and trucks are required to have brakes effective enough to stop them within a certain distance at regulated speeds.
Step-by-step explanation:
The standards for braking distances vary according to different regulations and vehicle types, but one must consider factors like road conditions, driver reaction time, vehicle weight, and initial speed to determine these distances. Unfortunately, without specific regulatory context, it is not possible to categorically state the exact requirements for passenger and other motor vehicle braking capabilities. Generally, passenger vehicles and trucks are expected to stop within certain distances when traveling at regulated speed limits to ensure road safety.
Passenger vehicles should possess brakes that can effectively stop the car within a safe distance, and trucks and vans under certain weights are held to a similar standard. For instance, a truck traveling at a constant velocity and forced to stop suddenly must decelerate effectively enough to not hit any obstacles or pedestrians in its path.
Brakes must be able to stop passenger vehicles traveling at a certain speed within a specified distance, whereas other motor vehicles like trucks and vans under a specific weight must be able to stop within an additional distance. Safety standards emphasize that all brakes should be periodically checked and, if necessary, adjusted to maintain these capabilities.