When approaching a railroad crossing with flashing lights you must?

Related questions

1. What's a red signal on a train?
2. What is a Signalling failure?
3. What is signal overlap?
4. Do trains turn around?
5. What is a shunt signal?
6. What activates a train signal?
7. Why do trains have signals?
8. Do trains have traffic lights?
9. How many types of signals are there in railway?
10. What is fixed block Signalling?

Tags

1. #approaching
2. #railroad
3. #flashing
4. #approach
5. #crossing
6. #means
7. #should
8. #train
9. #tracks
10. #lights
11. #instance
12. #either