What should the bus driver do if they see an approaching vehicle while preparing to stop?

When a bus driver sees an approaching vehicle while preparing to stop, waiting to come to a complete stop is the appropriate course of action. This ensures the bus driver can assess the situation carefully, allowing them to make sure that stopping safely does not interfere with the approaching vehicle.

By waiting, the bus driver can maintain control of the bus and make sure that all students on board are safe during the stopping process. This is especially important because children's safety is a priority, and the driver must ensure that it is safe to proceed with stopping before doing so.

The other actions, such as ignoring the approaching vehicle or accelerating away, could lead to dangerous situations. Checking for a clear path is crucial at all times, but in the context of preparing to stop, the most prudent action is to wait and ensure safety first.