Before entering an intersection, an ambulance driver should look:

The correct approach for an ambulance driver before entering an intersection is to look left-right-left. This method ensures comprehensive situational awareness.

When approaching an intersection, looking to the left first is critical because this is the direction from which oncoming traffic or pedestrians are most likely to come. Once the driver checks this direction, looking to the right is essential to observe any vehicles or hazards that might be coming from that side as well. Finally, looking left again serves as a final check before proceeding, ensuring that any changes in the traffic situation have been accounted for, including the potential movement of pedestrians or vehicles that may have been obscured during the first glance.

This systematic visual scan reduces the chances of missing important visual cues and enhances the safety of the ambulance's operation as it navigates through intersections, which are often complex and can pose significant risks.