This sign means you are approaching a railroad crossing without a signal. You should:

The correct response emphasizes the importance of safety when approaching a railroad crossing without a signal. This type of sign serves as a warning to drivers that there may be trains passing and that caution is necessary. By looking both ways, listening for trains, and being prepared to stop, drivers are taking proactive steps to prevent accidents. This comprehensive approach ensures that they can react appropriately to the presence of a train, which may approach unexpectedly and cannot be stopped in time if a vehicle crosses the tracks.

Options advocating to ignore signs or check for trains only during the daytime overlook the critical need for vigilance around railroad crossings at all times, regardless of the conditions. Speeding up to cross is especially dangerous and can lead to serious accidents, as it reduces the driver's ability to stop if a train is approaching. Recognizing the potential hazards at railroad crossings helps maintain safety for all road users.