Low bridge strikes are one of the most common and most expensive RV accidents on the road today. According to infrastructure reports, over 5,000 bridge strikes happen every year in the United States alone. The damage from a single hit can range from $30,000 to well over $100,000 when you factor in the cost of repairing (or totaling) the RV, bridge repairs billed to the driver, emergency response fees, and traffic disruption. The worst part? Nearly all of them are preventable.

Whether you drive a towering Class A motorhome or pull a fifth wheel, understanding your vehicle's height and planning your route accordingly is one of the most important safety habits you can build. This guide covers everything you need to know to make sure you never become a low bridge statistic.

Why Low Bridge Strikes Happen

Most bridge strikes don't happen because a driver was reckless. They happen because of small oversights that add up to a very big problem. Here are the most common reasons:

• Using regular GPS navigation. Standard navigation apps are designed for cars. They have no data about bridge heights, and they'll happily route a 13-foot motorhome under a 9-foot overpass without a second thought.
• Not knowing your actual RV height. Many RVers know their rig is "about 12 feet" but have never measured from the ground to the absolute highest point. That vague number is what gets people in trouble.
• Forgetting about rooftop additions. Your RV's spec sheet lists the factory height, but it doesn't account for the rooftop AC unit you added, the satellite dish, the CB antenna, or the cargo carrier on top. Each one can add 6 to 18 inches.
• Following truck routes blindly. Some drivers assume that if a semi can fit, their RV can too. But many commercial truck routes have minimum clearances of 13'6" or 14 feet, which is fine for a standard semi trailer but too low for a tall Class A with a rooftop AC.
• Distracted driving. Even when warning signs are posted, drivers who are tired, distracted by passengers, or focused on unfamiliar roads can miss them entirely.

Know Your RV's True Height

This is the single most important thing you can do to prevent a bridge strike: measure your RV accurately, from the ground to the absolute highest point.

Park on flat, level ground. Use a tape measure or a telescoping measuring pole (available at most hardware stores). Measure from the pavement to the tallest thing on your roof. That might be the AC shroud, a satellite dish, an antenna, or a roof vent. Whatever sticks up the highest, that's your number.

Once you have that measurement, add 6 inches as a safety margin. Road surfaces aren't always perfectly flat, your suspension compresses differently when loaded, and posted bridge clearances aren't always accurate. That extra 6 inches is cheap insurance.

Here are typical height ranges by RV type:

RV Type	Typical Height Range
Class A Motorhome	11 - 13 feet
Class C Motorhome	10 - 12 feet
5th Wheel Trailer	12 - 13.5 feet
Travel Trailer	10 - 11 feet
Truck Camper	10 - 12 feet
Camper Van	8 - 10 feet

Once you know your height, write it on an index card and tape it to your dashboard where you can always see it. Some RVers also put a sticker on the sun visor or on the rearview mirror frame. The goal is to make it impossible to forget. When you're approaching a bridge and you see a clearance sign, you want that number in front of you instantly — not buried in a manual in the back of a cabinet.

How to Spot Low Bridge Warning Signs

Most low bridges have some form of warning, but not all of them, and they're easy to miss if you don't know what to look for.

Yellow diamond signs are the most common. They'll show a bridge icon with a clearance height posted (for example, "LOW CLEARANCE 11'-2""). These are usually placed several hundred feet before the bridge.

Flashing overheight detectors are installed at some of the most frequently struck bridges. If your vehicle triggers the sensor, flashing lights and sometimes an electronic sign will warn you to stop. Take these seriously — they exist because that bridge has been hit many times before.

Rumble strips are sometimes installed on the road surface before a low bridge, especially on highways. The sudden vibration is meant to get your attention and prompt you to look for signage ahead.

However, not all low bridges have warnings. Many rural bridges, especially older railroad overpasses, have no signage at all. The bridge was built decades ago when vehicle heights were shorter, and nobody ever added a sign. Railroad overpasses are particularly dangerous because they tend to be lower than highway bridges — often in the 11 to 12-foot range — and they're frequently found on secondary roads where you might not expect them.

What to Do If You're Approaching a Low Bridge

You're driving down an unfamiliar road and you see a low clearance sign ahead. Here's what to do:

Do NOT try to "make it" if you're unsure. This is the number one mistake. Drivers see a posted clearance that's close to their height and think, "I'll probably fit." Probably is not good enough. If there's any doubt at all, stop.

Pull over safely before the bridge. Get out and look at the clearance sign. Compare it to the number on your dashboard card. If the posted clearance is less than your height plus your safety margin, do not proceed.

If there's no sign posted, assume the bridge is too low. It's better to lose 20 minutes finding an alternate route than to lose $50,000 and your RV.

Never trust the posted height 100%. This is a critical point that catches even experienced RVers off guard. Posted clearances are measured when the bridge and road are first built or last surveyed. Since then, the road may have been repaved multiple times, and each layer of asphalt raises the road surface by an inch or two. A bridge posted at 12'6" might actually only have 12'2" of clearance after several repaving jobs. That 4-inch difference can be the difference between clearing the bridge and tearing your AC unit off the roof.

When in doubt, turn around. Find a safe place to make a U-turn or pull into a parking lot. Check your map for an alternate route. Yes, it's inconvenient. It's far less inconvenient than a bridge strike.

Planning Routes to Avoid Low Bridges

The best way to handle low bridges is to never encounter them in the first place. That means planning your route before you leave, not relying on whatever the GPS tells you in real time.

The most effective tool is an RV-specific GPS or navigation app that factors in your vehicle's height, weight, and length. You enter your rig's exact dimensions once, and the app automatically routes you around any bridges, tunnels, or overpasses that your vehicle can't safely clear. This is dramatically different from regular GPS apps, which have no bridge height data in their routing algorithms. A standard navigation app will happily send a 13-foot Class A motorhome under a 9-foot railroad overpass because it simply doesn't know the bridge exists as an obstacle.

There are several RV navigation options on the market. WhimTrav is one that handles height-restricted routing — you enter your rig's height, weight, and length once, and it plans routes around low clearances automatically. Dedicated RV GPS units from companies like Garmin also offer vehicle-profile routing. The key is to use something purpose-built for large vehicles rather than trusting a car-focused app with your RV.

Beyond navigation apps, a few other route-planning tips help:

• Stick to interstates and US highways when possible. Federal highways have minimum clearance requirements (usually 14 feet on interstates, 13'6" on other federal routes). It's the state roads, county roads, and especially urban parkways where low bridges hide.
• Research your route in advance. If you know you'll be driving through an unfamiliar city, spend 10 minutes looking at your route for potential trouble spots — railroad crossings, old downtown areas, and parkways are the most common problem zones.
• Have a backup route planned. If your primary route runs into a surprise detour that sends you onto unfamiliar roads, having a pre-planned alternative means you won't be scrambling to find a safe path in real time.

Famous Low Bridges RVers Should Know About

Some bridges are so notorious for vehicle strikes that they've earned their own reputations — and in some cases, their own fan followings. Here are a few that every RVer should know about:

The 11foot8 Bridge, Durham, NC. This railroad overpass on Gregson Street became an internet sensation thanks to a camera that recorded hundreds of trucks and RVs smashing into it. The bridge was originally posted at 11'8" (hence the nickname). It was finally raised in 2019 to 12'4", but it still catches RVs and box trucks regularly. The camera is still rolling, and the crashes are still happening.

Storrow Drive, Boston, MA. Posted at just 10 feet in several spots, this parkway along the Charles River claims victims every year — especially during September when college students flood into the city with rental trucks and U-Hauls. "Storrowing" has become a verb in Boston. If you're anywhere near the city with an RV, avoid this road entirely.

Parkway Bridges, New York. The parkways on Long Island and in Westchester County were built in the 1920s and 1930s with clearances as low as 7'6" to 11 feet. Commercial vehicles are banned, but every year RVers and truck drivers end up wedged under these stone overpasses. The Hutchinson River Parkway, Saw Mill River Parkway, and Belt Parkway are all frequent offenders.

Lake Shore Drive, Chicago, IL. Several underpasses on this iconic lakefront road have clearances that can catch taller RVs, especially Class A motorhomes and fifth wheels. The road also has sharp curves and narrow lanes that make it a poor choice for large vehicles regardless of height.

Memorial Drive, Cambridge, MA. Another Boston-area road with low clearances that regularly claims trucks and oversized vehicles. Like Storrow Drive, it runs along the river and has multiple low overpasses.

These are just the famous ones. There are literally thousands of low bridges scattered across the country on rural roads, in small towns, and at railroad crossings that have no internet fame but are just as dangerous. You can't memorize them all — which is why having the right navigation tools and knowing your height matters so much.

What to Do After a Bridge Strike

If the worst happens and you hit a bridge, here's what to do immediately:

1. Stop immediately and pull over safely. Do not continue driving. The structural integrity of your RV may be compromised, and driving could cause a weakened roof to collapse.
2. Turn on your hazard lights and set out warning triangles or flares if you have them. A stopped RV near a bridge is a hazard to other traffic.
3. Check for propane leaks. If the impact damaged your rooftop propane lines or regulators, you could have a gas leak. If you smell propane, move everyone away from the vehicle immediately.
4. Assess the damage visually. Look at the roof from outside. Is it caved in, peeled back, or buckled? Check the AC units, vents, and any rooftop equipment. Look inside for ceiling damage, cracked walls, or shifted cabinets.
5. Document everything with photos. Take pictures of the bridge, the clearance sign (or lack of one), the damage to your RV from multiple angles, and the overall scene. Your insurance company will need all of this.
6. Call the police and file a report. A bridge strike is a reportable accident in most jurisdictions. The police report will be essential for your insurance claim and may be required by the bridge owner (railroad, state DOT, or municipality).
7. Contact your insurance company. Report the incident as soon as possible. Most RV policies cover bridge strikes, but the process will go much more smoothly with a police report and thorough photo documentation.
8. Do NOT drive if there's any question about structural integrity. If the roof is damaged, the RV may not be safe to drive. A compromised roof can collapse at highway speeds. Call a tow truck and have the RV transported to a qualified repair shop for inspection.

Prevention Checklist

Keep this list handy as a quick reference before every trip:

• Measure your RV's height from the ground to the absolute highest point (AC unit, antenna, satellite dish).
• Add 6 inches to your measured height as a safety margin.
• Write your height on a card and tape it to the dashboard where it's always visible.
• Use RV-specific navigation that routes around low bridges based on your vehicle's dimensions.
• Never trust posted clearance 100% — road repaving can reduce actual clearance by several inches.
• Watch for warning signs — yellow diamonds, flashing detectors, and rumble strips.
• Stay on major highways when possible, and research unfamiliar routes in advance.
• When in doubt, don't go through. Turn around and find an alternate route. Every time.

A low bridge strike is one of the most avoidable accidents in RVing. Know your height, plan your route, and pay attention to the road. Those three habits will keep you and your rig safe for many thousands of miles to come.