What must students do when the bus driver signals it is safe to cross?

When the bus driver signals that it is safe to cross, students must look both ways before proceeding. This action is crucial for ensuring their safety. Looking both ways helps them confirm that there are no oncoming vehicles or hazards that could pose a danger while they are crossing the street.

This practice reinforces the importance of being aware of their surroundings and making informed decisions, even when they have received a signal from the bus driver. Other options do not support safe crossing behavior; for instance, running across the road can lead to accidents, waiting for the bus to depart may not always be necessary, and crossing immediately without looking completely disregards safety protocols. Thus, looking both ways is the essential and correct action to ensure a safe crossing experience for students.