Ace the School Bus CHP Test 2025 – Drive Your Future to Success!

The correct choice indicates that a driver’s supervision with regard to pupil safety begins when the driver can see a pupil approaching the stop. This is crucial for ensuring that the driver is aware of the pupil's presence and can take necessary precautions to safeguard their safety before boarding the bus.

Being able to see the pupil allows the driver to assess the situation and be prepared for potential hazards, such as other vehicles in the vicinity or the pupil's behavior while approaching. Effective supervision starts at this point because it enables the driver to anticipate the student's needs and respond accordingly, laying the groundwork for a safe boarding process.

While the other options present important moments concerning pupil safety, they don't reflect the proactive responsibility the driver has at the moment they can observe a pupil approaching. That’s why the moment of visibility is the key trigger for the driver’s attentiveness regarding safety.