What type of crossings include flashing red lights?

Answer: B — Active crossings

Active crossings are designed to provide clear and immediate alerts to drivers and pedestrians regarding the presence of an oncoming train. The flashing red lights found at these crossings are a key feature of this signaling method, indicating that it is unsafe to proceed. This system is crucial for enhancing safety at train tracks, as it effectively communicates the need for caution and prompts vehicles to stop. In contrast, passive crossings typically only contain signs and pavement markings without any warning lights or signals, relying on the driver’s attentiveness to notice potential hazards. The other terms, such as stop crossings and signal crossings, might describe specific ways to manage traffic but do not specifically denote the presence of flashing red lights. Thus, the defining characteristic of active crossings is their use of lights and audible signals to actively guide and protect motorists and pedestrians at potentially dangerous intersections.