What is required when traveling at high speeds in terms of stopping distances?

When traveling at high speeds, greater stopping distances are required due to a combination of factors including speed, momentum, and reaction time. As speed increases, the vehicle's momentum also increases, meaning it requires more force to bring the vehicle to a stop.

Moreover, the laws of physics dictate that the distance needed to stop a vehicle is proportional to the square of its speed. Thus, when a driver is moving faster, even minor delays in reaction or braking will contribute to significantly longer stopping distances. For instance, at higher speeds, the driver has less time to perceive and respond to obstacles, leading to the necessity of anticipating this increased stopping distance well in advance.

Additionally, it is important to consider road conditions, vehicle weight, and brake quality, but the overarching principle remains that the higher the speed, the longer the distance required to stop safely, explaining why the correct answer emphasizes the need for greater stopping distances.