Stopped on a bridge with no shoulder: how to stay safe until help gets there

Why a bridge is the worst place to stop

Most breakdown advice assumes a shoulder, a guardrail and a bank to stand behind. A bridge or overpass often has none of those. The lane runs up to a concrete parapet or railing, and on the other side of it is a drop to a river, a railroad or another highway.

That creates three problems at once. There is nowhere to walk, because any path along the truck or back toward traffic is in the traffic lane. Warning triangles may be impossible to place safely, for the same reason. And sight distance is often short: many overpasses rise to a crest, and ramps onto bridges can curve, so drivers coming up behind you may not see a stopped trailer until they are close to it.

The practical result is that the usual instinct to get out and get away from the truck needs a second thought on a bridge. The safest place may be the cab you are already sitting in.

If it still rolls, get off the structure

The best breakdown on a bridge is the one that ends past the far end of it. Whether you should try depends on what has failed:

• Keep rolling if you still have steering and brakes. A warning light, a derate or rising temperature usually leaves enough control to reach the end of the bridge. Flashers on, stay in your lane, and stop at the first shoulder or ramp beyond it.
• Stop if steering, brakes or air are failing. Get as far toward the right edge as the lane allows and stop. Do not try to force a truck with failing brakes across a long structure.
• Stop for fire or heavy smoke, and be ready to leave the cab.
• Do not stop on the crest of an overpass if the truck will safely carry you a little further, where drivers behind can see you sooner.
• Never reverse on a bridge or an on-ramp to get back to a shoulder you just passed.

Stay in the cab: what official guidance says

Transportation and patrol agencies are consistent that staying in the vehicle is usually the safer choice. The Missouri Department of Transportation's breakdown advice says it is safer to stay inside and warns against stepping out into a lane of traffic. The Kansas Highway Patrol tells stranded drivers to keep hazard lights on and seat belts fastened while they call for help.

Maryland's state highway safety office addresses bridges directly. Its advice is that if you can remain in the vehicle, you should stay buckled and face forward, especially when stopped on an elevated roadway such as a bridge or overpass. Staying belted in a normal seated position gives you the most protection if the vehicle is struck.

The same guidance says that if it is not safe or possible to stay, you should judge the moment to get out, then move quickly away from the roadway to a spot behind a barrier, guardrail or embankment. For a truck driver, the reasons to leave are fire, smoke, a fuel leak, or a truck sitting where you believe a strike is likely. If you do go, leave on the side away from traffic, keep close to the bridge rail, never climb over it, and head for the nearest end of the structure rather than walking back toward oncoming traffic.

Warning triangles when there is no shoulder

The federal rule, 49 CFR 392.22, does not exempt bridges. When a commercial vehicle stops on the traveled part of a highway, the hazard flashers go on immediately and stay on until warning devices are placed, and the triangles go out as soon as possible and within 10 minutes. On a divided highway they go behind the truck at about 10, 100 and 200 feet. If the truck is within 500 feet of a hill crest, curve or other obstruction to view, one goes back toward it, between 100 and 500 feet away, which is often exactly the situation on an overpass.

On a bridge with no shoulder, reaching those spots means walking in the lane the truck is blocking, with traffic coming at you over a crest. Weigh it this way:

• Flashers are the warning you can always give. They go on before anything else and stay on.
• Place triangles only where you can walk without moving traffic beside you. For example, when traffic behind has come to a complete stop, or a lane beside you has been closed.
• If you cannot, say so on the call. Tell the dispatcher the truck is on a bridge, the triangles are not out, and why. That tells the patrol the scene needs protecting.
• Put them out once it is safe. After a patrol car or other responder is protecting the lane, set the triangles where they belong.
• For full placement details, see our guide to where to place warning triangles.

Calling for help and naming the bridge

A truck stopped in a lane on a bridge is an emergency call, not just a tow call. Use 911, *55 for the Missouri State Highway Patrol, or *47 for the Kansas Highway Patrol, or *582 on the Kansas Turnpike. Mile marker posts may be hard to see from a bridge, so the structure itself becomes your landmark.

Around Kansas City, several major bridges carry interstates across the rivers. The Christopher S. Bond Bridge carries I-29 and I-35 over the Missouri River just north of downtown Kansas City. The Lewis and Clark Viaduct carries I-70 across the state line between Kansas City, Kansas and Kansas City, Missouri. I-435 and I-635 each cross the Missouri River where it forms the state line, which puts the two ends of each of those bridges in different states. When you call, give:

• The highway and direction. For example, I-35 northbound.
• The bridge or what it crosses. Its name if you know it, or the river, railroad or highway underneath.
• The last exit you passed. And whether you are near the start, middle or end of the structure.
• The state, on any bridge at or near the state line.
• Your lane. Right lane, left lane, or the only lane, and whether any traffic can get past.
• Whether anyone is hurt and whether there is smoke, fire or a leak.

How a tow on a bridge is handled

A wrecker cannot pull onto a shoulder that does not exist. To reach a truck stopped in a lane on a bridge, it has to stop in the traffic lane too, usually in front of the disabled unit, and its crew has to work around the front of the truck to hook it. That is not something to start while traffic is still passing within feet, so a bridge tow depends on traffic control. The responding patrol decides how the lane is protected, which may mean closing a lane or holding traffic briefly while the truck is hooked and pulled clear.

Move-over laws add some protection. Missouri's, RSMo 304.022, requires drivers approaching a stopped tow truck, emergency vehicle or MoDOT vehicle with its lights on to move out of the adjacent lane where there are two lanes in their direction, or slow down if they cannot. Kansas covers more than emergency vehicles: K.S.A. 8-1530 applies to a stationary emergency vehicle showing its lights, and K.S.A. 8-15,116 extends the same duty to any stopped vehicle displaying hazard warning lamps, flares or caution signals such as cones or reflective triangles — change into a lane away from it where that is safe, and otherwise slow down. On a one-lane ramp or a bridge with a closed lane, there is no lane to move into, which is why the patrol's traffic control matters.

The usual plan is simple: hook the truck and tow it off the structure to the nearest safe place, whether that is a wide shoulder, a ramp, a lot or straight to a shop. Nobody should attempt roadside repair from a live lane on a bridge. If the truck struck the bridge rail or anything else on the structure, the bridge itself is a matter for the highway agency and the responding officers, not the tow company.

Once the truck is off the bridge

After the unit is somewhere safe, the decision is the same as any other breakdown: fix it there or take it in. Tell the tow company the tractor and trailer type, whether it is loaded, whether it builds air and rolls, and where it should go. Our heavy-duty towing page covers loaded tractor-trailers across the Kansas City area, including bridge and interstate calls.

A bridge with a lane closure is a close cousin of a highway work zone, and our guide to breaking down in a construction zone covers the same stay-or-go decision with barrier walls. For giving a location on the specific corridors, see our posts on I-70 in Kansas City and I-35 north through Liberty to Cameron.

Sources

• 49 CFR 392.22, Emergency signals; stopped commercial motor vehicles

Related reading

Semi Broke Down in a Construction Zone: What to Do — If the truck can still move safely, keep going until you clear the work zone.

Where to Place Warning Triangles When a Semi Breaks Down — Turn on your hazard flashers immediately, then place three warning triangles as soon as possible and within 10 minutes.

Broke Down on I-35 North: Liberty and Kearney to Cameron — Turn on your hazard flashers, get as far out of the lanes as you safely can, and call 911 or the Missouri State Highway Patrol at *55.