A bus is stopped 20 feet from the nearest rail. The driver opens the door and window, silences passengers, looks and listens, and then sees a train approaching on a second track after a first train passes. What should the driver do?

1. Remain stopped until all tracks are clear and it is safe to cross
2. Cross because the first train has already passed
3. Stop between the tracks to wait for the second train
4. Ask passengers whether the second train looks far enough away