Final answer:
When riding over a railroad crossing, you should always stop and make sure it is safe to proceed.
Step-by-step explanation:
When riding over a railroad crossing, you should always stop and make sure it is safe to proceed. This is because trains have the right of way and can be much larger and faster than other vehicles, making it difficult to judge their distance and speed. By stopping, you give yourself enough time to assess the situation and cross the railroad safely.