On a 40-foot bus traveling at 50 mph on dry roads with good visibility, keep at least how many seconds of space in front?

On a 40-foot bus traveling at 50 mph on dry roads with good visibility, keep at least how many seconds of space in front?

• A. 3 seconds
• B. 4 seconds
• C. 5 seconds
• D. 6 seconds

Answer: (C)

The spacing concept here is that your following distance must cover both the driver's reaction time and the bus’s longer stopping distance at highway speeds. At 50 mph, you travel about 73 feet each second. Five seconds of space equates to roughly 365 feet in front. For a 40-foot bus, that extra length plus the momentum means you need more distance than a typical car to safely perceive a hazard, brake, and come to a stop if the vehicle ahead slows suddenly. Three or four seconds would leave too little room to stop safely, especially with a heavy bus; six seconds would be even safer but isn’t the minimum under these dry, good-visibility conditions. So, five seconds is the appropriate minimum in this scenario.

The spacing concept here is that your following distance must cover both the driver's reaction time and the bus’s longer stopping distance at highway speeds. At 50 mph, you travel about 73 feet each second. Five seconds of space equates to roughly 365 feet in front. For a 40-foot bus, that extra length plus the momentum means you need more distance than a typical car to safely perceive a hazard, brake, and come to a stop if the vehicle ahead slows suddenly. Three or four seconds would leave too little room to stop safely, especially with a heavy bus; six seconds would be even safer but isn’t the minimum under these dry, good-visibility conditions. So, five seconds is the appropriate minimum in this scenario.