What is the required stopping distance for new apparatus from a speed of 20 mph?

The required stopping distance for new apparatus from a speed of 20 mph is based on various factors, including the vehicle's design, weight, braking system, and road conditions. In general, the stopping distance is calculated by considering both the perception-reaction distance and the braking distance.

At a speed of 20 mph, the perception-reaction distance, which is the distance traveled from the moment a driver perceives a hazard until they actually begin to apply the brakes, is around 20 feet. The braking distance, which is the distance required for the vehicle to come to a complete stop after the brakes have been applied, varies based on the conditions and design of the vehicle. For new apparatus specifically, with modern braking systems and various safety features in place, the braking distance tends to be shorter than that of older vehicles.

Taking these factors into consideration, the total stopping distance when calculated results in around 35 feet for new apparatus at a speed of 20 mph. This distance ensures that the apparatus can come to a stop in a safe and controlled manner, accounting for both the initial reaction time and the time required to slow down effectively.