When traveling at 20 mph, a combination vehicle must stop within how many feet?

When dealing with stopping distances for a combination vehicle traveling at 20 mph, it's important to consider the various elements that contribute to how quickly the vehicle can come to a complete stop. Generally, stopping distance is influenced by factors such as the vehicle's weight, road conditions, and the driver's reaction time.

For a combination vehicle, the stopping distance can be longer due to its greater mass compared to single-unit vehicles, which affects braking efficiency and response time. At 20 mph, combination vehicles typically require around 40 feet to stop safely under standard driving conditions. This distance ensures that there's enough space to account for the vehicle's momentum and allows for safer stopping without risking accidents or collisions.

Thus, 40 feet is a realistic approximation for stopping distances at this speed, taking into account the complexities involved in stopping heavier and longer vehicles, which is why this answer is considered correct in the context of safe driving practices within Texas commercial vehicle regulations.