Maryland CDL School Bus Test study materials
Maryland CDL School Bus Test study resources

Fog, a Passive Crossing, and a Tailgating Pickup

Maryland CDL School Bus Test · Put your knowledge to work in context.

All case studies

Fog, a Passive Crossing, and a Tailgating Pickup

You are driving a 38-foot school bus with 12 students on a rural two-lane road at 6:45 a.m. in dense fog. You approach a railroad-highway grade crossing with only a crossbuck; there are no gates or flashing lights. The road slopes down to the tracks, and the painted stop line is 12 feet from the nearest rail. A pickup truck is tailgating about 20 feet behind. You stop, open the service door and driver window, and listen. Visibility down the track is 300 feet to the right and only 150 feet to the left because of a curve. You hear a distant train horn but see no train. The crossing surface is rough, and beyond the tracks the road rises with room for the bus plus 50 feet.

1. Where exactly should you stop, and why does the painted line matter?

Read the worked answer

Stop at least 15 feet from the nearest rail and no farther than 50 feet from it. The painted stop line is only 12 feet from the rail, so stopping at the line would put the bus too close to the track. You should stop about 3 feet before the line, or farther back if that gives a better view, as long as you remain within the 15-to-50-foot zone. Do not stop on the tracks or so close that the front overhang could be struck. The tailgating pickup does not change the legal stopping point; slow early and use your brake lights so the driver behind can react. The stop must also leave enough room beyond the crossing for the entire bus to clear the tracks without stopping on them.

2. Do you proceed? What checks must be complete before moving?

Read the worked answer

Do not proceed yet. A distant horn with no visible train, combined with only 150 feet of visibility to the left, must be treated as a train until you prove otherwise. With the door and window open, look and listen in both directions again. Check that the tracks are clear beyond the crossing for the full length of the bus plus the 50 feet of road space you identified. Check that the pickup behind is stopped or has room to stop. Select the proper low gear before crossing and do not shift gears while on the tracks. If the horn sounds closer or the crossing view remains blocked, stay stopped and do not cross. Hearing is not enough when visibility is limited; proceed only when the whole path is clear.

3. What should you do if the bus stalls on the tracks or a train appears as you start across?

Read the worked answer

If the bus stalls on the tracks, get the students off immediately and move them away from the tracks. Do not waste time trying to restart the engine if a train is approaching. Send someone to call 911 and radio dispatch if possible, but getting students clear is the priority. If a train is visible or its horn is close, move away from the tracks at a 45-degree angle toward the approaching train to reduce exposure to debris. Account for all 12 students at a safe distance. If the bus stalls but no train is approaching, still evacuate, call for help, and do not let students stand near the crossing. Once clear, do not reboard until emergency responders or railroad personnel say it is safe.