A crossing has two sets of tracks. After crossing the first track, the driver would have only 8 feet of rear clearance if stopping before the second. What should the driver know?

1. A second stop is allowed because the first track is clear
2. A second stop is not allowed unless the bus is completely clear of the first crossing with at least 15 feet clearance in front and rear
3. The driver should stop with the rear over the first track
4. The driver should ask students to watch for trains from the aisle