Where will you encounter a flashing red light?

A flashing red light is typically encountered at a level crossing, which is where railway tracks intersect with the road. The purpose of this signal is to warn drivers that a train is approaching and they must stop their vehicle and not proceed until the light stops flashing. This is crucial for ensuring safety at these potentially dangerous intersections.

In contrast, while flashing lights can be found at various locations, the scenarios presented in the other options do not typically involve flashing red lights. For example, a flashing red light is not standard at intersections, pedestrian crossings, or roundabouts. Instead, those locations generally use different types of traffic signals or signs to direct vehicle and pedestrian movements. Thus, the identification of flashing red lights specifically at level crossings aligns with traffic safety protocols related to railway crossings.