How many feet does it typically take for an average car driving at 55 mph to stop?

When an average car is traveling at 55 mph, it typically takes about 130 to 140 feet to come to a complete stop under normal conditions. This distance can vary based on factors such as road conditions, vehicle type, and reaction time of the driver. The stopping distance includes the time it takes for the driver to react to a hazard (reaction distance) and the time it takes for the vehicle to physically stop once the brakes are applied (braking distance).

At 55 mph, the reaction time is critical, as a driver often doesn't start to brake immediately upon seeing a hazard. The average reaction time is about 1.5 seconds, which contributes significantly to the overall stopping distance. Once the brakes are applied, the car continues to travel forward before coming to a complete stop, further adding to the required distance.

Thus, the choice indicating that it takes 130 to 140 feet to stop at this speed aligns with typical calculations and safe driving practices. Understanding these distances is essential for maintaining safe following distances and responding adequately to potential road hazards.