Final answer:
When crossing railroad tracks, one should wait to proceed until a clear view of all tracks is available to ensure no trains are approaching. Always be cautious and obey all signals and signage to maintain safety in areas where vehicles interact with trains.
Step-by-step explanation:
When crossing railroad tracks, you should c) Wait to proceed until you have a clear view of all tracks. It is important to ensure there are no trains approaching from either direction before you cross. Proceeding without stopping or speeding up can be dangerous if a train is coming, and keeping the vehicle in neutral is not safe as it may become immobilized on the tracks.
Safety is paramount near railroad tracks, and it's critical to obey all railroad crossing signals and signs. If a rapidly moving commuter train is passing by, one should maintain a safe distance because atmospheric pressure can create a suction effect that could pull a person towards the train. As for vehicles, traffic signals play an essential role in controlling speed and maintaining safety on the roads, and acting against these signals can lead to accidents.
Understanding the pitch changes due to the Doppler effect can help in assessing relative speeds. If a train horn sounds lower than its actual frequency, it means either the train or you are moving away from each other. To match the speed of the train, adjustments to your vehicle's speed are necessary.