Railroad Crossings for CDL Drivers: Rules, Signs, and Procedures

Railroad crossings are one of the most heavily tested topics on the CDL written exam, especially for passenger and Hazmat endorsements. The rules are strict because the consequences of getting them wrong are catastrophic — a train cannot stop quickly, and a collision between a train and a commercial vehicle is almost always fatal. This guide covers every rule, sign, and procedure you need. Test your knowledge with our free CDL practice tests.

Which Vehicles Must Stop at Railroad Crossings?

Not all commercial vehicles are required to stop at every railroad crossing. The FMCSA regulations (49 CFR 392.10) specify which vehicles must stop:

Vehicles that MUST stop at all railroad crossings:

• Motor vehicles transporting passengers for hire (buses, motorcoaches)
• Commercial vehicles transporting any quantity of Hazmat that requires placarding
• Cargo tank vehicles transporting hazardous materials (whether or not placarded)
• Vehicles transporting Division 2.3 (poison gas) or Division 6.1 (poison materials)

Vehicles that are NOT required to stop but must slow and check:

• Standard freight trucks not carrying Hazmat
• Box trucks, flatbeds, and dry vans without hazardous cargo
• Tankers carrying non-hazardous liquids (milk, water, food products)

Even if you're not required to stop, you must slow down, check for trains in both directions, and proceed only when it's safe. Never try to beat a train — they are closer and moving faster than they appear.

The Required Stop Procedure

For vehicles required to stop, follow this exact procedure at every railroad crossing:

1. Approach with caution. Reduce speed and check for warning signs, signals, and gates.
2. Stop between 15 and 50 feet from the nearest rail. Never closer than 15 feet — the train overhangs the rail by at least 3 feet on each side.
3. Set the parking brake and put the transmission in park or neutral.
4. Turn on hazard (four-way) lights.
5. Open the driver-side window and door (required for buses). This allows you to hear approaching trains that you may not see.
6. Look and listen in both directions. Trains can come from either direction on any track, including tracks that appear unused.
7. Check for multiple tracks. If there are multiple tracks, make sure a train is not approaching on any of them before proceeding.
8. When clear, close the door, cancel hazard lights, and proceed smoothly across the tracks.
9. Do not shift gears while crossing. Shift to the appropriate gear before starting across so you don't stall on the tracks.
10. Clear the crossing completely before stopping again — never stop on the tracks for any reason.

Railroad Crossing Warning Signs

The CDL test will ask you to identify railroad crossing signs and signals. Here's what to look for:

• Advance Warning Sign: A round, yellow sign with a black X and the letters "RR." This is placed 750–1,000 feet before the crossing. When you see this sign, start slowing down.
• Pavement Markings: "RXR" painted on the road surface, followed by a stop line (white line) 15–50 feet before the crossing.
• Crossbuck Sign: A white, X-shaped sign with black lettering that reads "RAILROAD CROSSING." This is the actual crossing marker. At a crossbuck without lights or gates, you must yield to trains.
• Flashing Lights: Red flashing lights mean a train is approaching. You must stop.
• Gates: When gates are lowering or down, you must stop and wait. Never drive around a lowered gate — this is illegal and lethal.
• Multiple Tracks Sign: A small sign below the crossbuck indicating the number of tracks (e.g., "2 TRACKS"). Extra caution is needed — one train may clear and another may approach on a different track.
• Exempt Sign: A sign below the crossbuck that reads "EXEMPT" means certain vehicles (like buses and Hazmat trucks) are not required to stop — but only if no train is visible.

Emergency Procedures: If You Stall on the Tracks

If your vehicle stalls or becomes stuck on railroad tracks, every second counts. A train traveling at 50 mph covers 73 feet per second and needs approximately 1.5 miles to stop. Follow this emergency procedure:

1. Get everyone out immediately. Evacuate all passengers and yourself. Do not waste time trying to restart the vehicle or move cargo.
2. Move far from the tracks. Walk at least 100 feet away from the tracks — preferably in the direction the train is coming from. Why? Because if a train hits the vehicle, debris will be thrown in the direction of travel. Being behind the collision point (relative to the train) is safer.
3. Call the railroad dispatcher. Every railroad crossing has an emergency phone number posted on a blue sign near the signal. This is the fastest way to alert trains — faster than calling 911. Report your exact location and the crossing identification number.
4. Call 911. Report the situation and location. Provide the highway name, the nearest cross streets, and the crossing number if available.
5. Do not return to the vehicle until authorities confirm it is safe.

Common Railroad Crossing Test Questions

Study Tips for Railroad Crossing Questions

Railroad crossing questions are heavily featured on the CDL General Knowledge test and on the Passenger and Hazmat endorsement tests. To prepare:

1. Memorize the 15-foot / 50-foot stop distances
2. Know which vehicles are required to stop vs. just slow down
3. Understand the emergency procedure for stalling on tracks
4. Learn the meaning of every railroad crossing sign
5. Remember: never shift gears while crossing
6. Take our free CDL practice tests until you consistently answer all railroad questions correctly

If you're pursuing a Hazmat endorsement, railroad crossings are especially important — Hazmat trucks must stop at every crossing. Read our CDL Hazmat Endorsement Guide for more.

Frequently Asked Questions