When approaching a railroad crossbuck, when must you always stop?

When approaching a railroad crossbuck, it is crucial to stop when the lights begin to flash. This signal indicates that a train is either approaching or is already in the vicinity, and it serves as a warning for you to halt your vehicle. The flashing lights are designed to grab the attention of drivers, ensuring that they are aware of the immediate danger and the need to stop.

Stopping at this point provides you with the necessary time to assess the situation and ensure that it is safe to cross the tracks. The risk of an accident increases significantly if a vehicle continues to approach the crossing when the lights are activated, as trains can travel at high speeds and are often difficult to judge in terms of distance and speed.

While other signals like the sound of bells or the presence of stopped vehicles also indicate that one should be aware of trains, the most definitive signal of danger at a railroad crossing is the flashing lights. Therefore, it is essential to stop whenever these lights are activated, ensuring your safety and the safety of others at the crossing.