At what speed must you travel to ensure you can stop without hitting the vehicle ahead?

Answer: B — At a speed lower than the limit, depending on conditions

Traveling at a speed lower than the posted limit, depending on conditions, is vital for ensuring you can stop without hitting the vehicle ahead. This approach considers various factors that can affect stopping distance, such as weather conditions, road surface, traffic, visibility, and the condition of your vehicle. For instance, during adverse weather conditions like rain or snow, traction is reduced, which means your vehicle will require a longer distance to stop. Additionally, maintaining a speed lower than the limit allows for greater reaction time, providing the driver with the ability to respond to unexpected situations or sudden stops in traffic. Since stopping distance increases with speed, adhering to conditions rather than strictly following the posted limit is crucial in safely navigating the road. This mindset helps ensure that a safe buffer exists between your vehicle and others, reducing the likelihood of collisions.