On a two-lane highway, what must a slow-moving School Bus do when five or more vehicles are behind it while climbing a grade?

• A. Speed up
• B. Change lanes
• C. Use a turn out
• D. Stop immediately

Answer: (C)

In this scenario, a slow-moving school bus that has five or more vehicles trailing behind it while climbing a grade is required to use a turn out. This is essential for allowing the vehicles behind to pass safely and efficiently, especially in situations where the bus may be traveling at a significantly slower speed than other vehicles.

Using a turn out not only helps in reducing frustration among drivers trailing the bus but also enhances overall safety on the road by preventing potential accidents that could arise from vehicles trying to pass the slow-moving bus in an inappropriate manner.

This action is particularly important on grades, where slower speeds are expected, and it is less feasible for vehicles to pass the bus safely. The turn out provides a designated space for the bus to allow the following traffic to continue on without causing a backup or creating hazardous conditions.