Final answer:
Approach railroad grade crossings with caution, stop if a train is approaching, and be prepared to stop even if no train appears to be coming.
Step-by-step explanation:
When approaching a railroad grade crossing that has a standard railroad (RR) crossbuck and no visible gates or flashing lights, you should always approach with caution. You must look both ways and listen carefully to ensure that there are no trains approaching. If you see or hear a train, you must stop at a safe distance from the tracks and wait for it to pass before proceeding. It is important to be aware that trains cannot stop quickly, so never attempt to cross the tracks in front of an oncoming train. Additionally, even if you do not see or hear a train, slow down and be prepared to stop if necessary; a train could be approaching that you do not yet detect. The safety of every driver and pedestrian depends on vigilance and adherence to these safety protocols.
When approaching a railroad grade crossing that has no visible gates or flashing lights, but has a standard railroad (RR) crossbuck, you should stop moving and become stationary until it passes by. This is a safety precaution to ensure that you allow any approaching trains to pass safely without any risk of collision.
Ignoring the crossbuck or attempting to run toward or alongside the ambulance can be dangerous and is not recommended.