The Clearance Map Built for Truckers & RV Drivers
North America's leading low-clearance bridge app, with over 3× more verified bridges than any other. Plan safe routes, avoid costly strikes, and navigate turn-by-turn with HeadRoom, or send directions straight to Google Maps or Apple Maps.
Validated against public DOT records, computer-vision pipelines, and driver feedback. See live data stats · Commercial access
Plan Safe Routes Around Low-Clearance Bridges
Avoid bridge strikes
Truck Route Planning That Knows Your Height
The average bridge strike costs tens of thousands in damages, downtime, and DOT exposure. Plan around 24,000+ verified low-clearance bridges before you ever leave the yard.
Cut fuel and detour costs
Stop Burning Hours on Wrong-Way Detours
Every unplanned detour around a low bridge costs fuel, hours-of-service, and an irritated dispatcher. We route you around clearance hazards the first time so you don't have to back out of one.
Drive without second-guessing
Verified Clearances, Not Crowdsourced Guesses
Our database is validated against public records, computer vision, and driver feedback. Directional Hazard Headings suppress false warnings when you're on the safe side of a structure.
Built for first-timers too
Safer Trips for RVs, Rentals, and New Drivers
If you just rented a 12-foot box truck or picked up your first motorhome, you don't know which underpass will eat your roof. We do. Enter your height, get a route built around it.
Bridge Strikes Are More Common Than You Think
The FHWA documented over 13,000 collisions with fixed bridge objects on U.S. highways in 2018 alone. Every one of those strikes shut down a road, damaged a structure, and put a driver in front of an inspector.
Sources: U.S. Department of Transportation, Federal Highway Administration. Case Study: Response to Bridge Impacts. An Overview of State Practices (FHWA-HIF-20-087), September 2020. Read the report.
Indiana DOT damage claim figure reported by NBC News, "In Indianapolis, there's a really smashing bridge" (2013) and Equipment World coverage of repeat strikes at the Virginia Avenue Bridge. Read the article.
The Largest Verified Bridge Height Map in North America
Low Clearance Map maintains the most comprehensive bridge clearance dataset available to the public. 24,000+ verified low-clearance bridges and tunnels across the United States, Canada, and the United Kingdom. That's roughly 3× the coverage of the next-largest competitor.
Every entry is validated against public DOT records, computer-vision pipelines, and driver-submitted reports. Each location carries a directional Hazard Heading, a feature unique to Low Clearance Map, so alerts only fire when they're relevant to your direction of travel.
Owner-operators routing one rig and fleet managers integrating clearance data through our API or CSV feed work from the same dataset we route on every day.
HeadRoom: Voice-Guided Truck & RV Navigation That Avoids Low Bridges
Apple Maps, Google Maps, and Waze have zero bridge clearance awareness. HeadRoom is the in-cab navigation app built on the Low Clearance Map dataset. Voice-guided, height-aware, and re-routing in real time.
SafeRoute Navigation
Set your vehicle height once. HeadRoom continuously builds a route that fits.
Sentry Mode
Background hazard monitoring even when you're not actively navigating.
Hazard Headings
Directional alerts. No false warnings when you're on the safe side of a bridge.
Auto Reroute
If a low clearance is detected ahead, HeadRoom recalculates instantly.
Real walkthrough of HeadRoom on iOS. See more screenshots.
One subscription. iOS, Android, and the web platform.
How Our Bridge Height Map Works
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1
Enter Your Route
Add your starting point, destination, and any stops along the way to build a custom truck or RV route.
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2
Set Vehicle Height
Enter your truck, RV, or trailer clearance so we can route around any bridge, tunnel, or overpass that's too low to clear.
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3
Scan Against 24,000+ Verified Bridges
We check your path against the largest verified low-clearance dataset in North America, covering the U.S., Canada, and the U.K., and apply Hazard Headings so alerts only fire in your direction of travel.
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4
Send It to Apple Maps or Google Maps
Export your cleared route straight to Apple Maps or Google Maps and drive it with the navigation app you already use. Prefer voice guidance built specifically for tall vehicles? HeadRoom is our companion mobile app for iOS and Android with its own clearance-aware turn-by-turn navigation.
7-day free trial · then $4.99/month · cancel anytime.
What's Included in Your Subscription
$4.99/month after a 7-day free trial. Unlimited routing, the full Low Clearance Map dataset, and HeadRoom mobile navigation. Cancel anytime.
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Unlimited Truck & RV Routes
Plan as many height-aware routes as you need. No per-trip charges, no monthly route caps, no surprise overages.
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24,000+ Verified Bridges
The largest publicly available low-clearance dataset for trucks and RVs, covering the U.S., Canada, and the U.K. Every entry is validated against DOT records and driver feedback.
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Hazard Headings (Directional Alerts)
Each clearance carries directional metadata, so you only get warned when you're actually approaching the affected side of a bridge or tunnel. Fewer false alarms, better routing.
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On-Route & Adjacent-Structure Detection
We surface low-clearance structures both on your route and immediately alongside it. That matters for parking, staging, and last-mile maneuvers other tools miss.
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HeadRoom Mobile App Included
One subscription unlocks both the web platform and HeadRoom on iOS and Android, with voice-guided turn-by-turn navigation and Sentry Mode hazard monitoring.
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Apple Maps & Google Maps Handoff
Prefer to drive in Apple Maps or Google Maps? Send your cleared route over with one tap and use the navigation app you're already used to.
Built for Every Tall Vehicle on the Road
Owner-operators, fleet managers, and first-time RV renters. If your vehicle is taller than a sedan, the next bridge is a question worth asking.
Owner-Operators & Truckers
Class 8 routing that respects your tractor-trailer height. Over-the-road, regional, and last-mile.
RV & Motorhome Drivers
Class A, Class C, fifth-wheels, and travel trailers. National park trips and cross-country routes without the white-knuckle underpasses.
Box Truck & Moving Rentals
U-Haul, Penske, Budget, and Enterprise rentals. Most rental customers have never driven anything taller than an SUV. We make sure you don't learn the hard way.
Fleet Managers & Dispatchers
Standardize clearance-aware routing across your whole fleet via web, mobile, or our API and CSV feeds.
Bus & Motorcoach
Charter, school, and city transit operators routing 11′6″-13′6″ vehicles through unfamiliar urban corridors.
Oversized & Heavy Haul
Permit loads that need verified clearance evidence before pilot cars roll. We sit alongside your routing engine, not in place of it.
Tow & Recovery
Wreckers and rotators that need clearance data on the casualty vehicle and the recovery rig at the same time.
The Bridge Clearance Database Behind Every Route
Drop our verified clearance dataset directly into your dispatch system, telematics platform, or in-house routing engine. The same 24,000+ bridges, the same Hazard Headings, the same coverage across the U.S., Canada, and the U.K., delivered however your stack needs it.
- ✓ REST API with hazard queries by bbox or route
- ✓ Bulk CSV deliveries on a schedule you choose
- ✓ Hazard Heading directional metadata
- ✓ Validation provenance per record
- ✓ SLAs and volume pricing for fleets
- ✓ Sample data on request
Bridge Clearance FAQs
Low Clearance means there’s not enough space between the road and a bridge, tunnel, or overpass for taller vehicles to pass safely. If your truck, RV, or trailer is too high, you could hit a Low Clearance bridge. Always check clearance signs before you go through. A few extra seconds could save you a lot of trouble.
Our routing system includes accurate height clearance for trucks. That means you can avoid costly or dangerous clearance issues. Once your route is ready, you can send directions straight to Google Maps for easy navigation.
We check our bridge height clearance info using public records, tech-based tools, and feedback from drivers. Every point also has directional info (called Hazard Headings), so you only get alerts that match your direction. This helps cut down on unnecessary road hazard warnings.
We update the map whenever new details come in. This includes newly identified structures, changed bridge height clearances, and improved metadata. If you're a commercial client, you get regular CSV updates or live access through our API, so your system always stays current.
Low Clearance Map is a subscription-based service built to maintain high-quality bridge height clearance information. Individual users can sign up for a monthly plan with no long-term commitment, with a 7-day free trial to try it out. The plan includes unlimited truck and RV routing, and Google Maps integration, with no long-term commitment required.
Commercial users can access the full bridge clearance database through API or CSV download, allowing full integration into custom apps, routing platforms, and fleet management tools. This enables in-house generation of road hazard alerts, custom routing engines, and more. Contact us to discuss licensing terms and data delivery formats.
Most bridge height clearance tools don’t include directionality, but Low Clearance Map does. Each Low Clearance bridge includes a Hazard Heading—this tells you which direction the road hazard affects. If you're on the safe side of a bridge or tunnel, you won’t get a false warning. This improves the accuracy of your route, improving routing logic and driver experience.
We currently cover the United States, Canada, and the United Kingdom. Each bridge and tunnel location is geotagged with its height clearance, direction info, and relevant metadata to support both individual and enterprise-level routing.