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Low Clearance Map Data Overview

Stats

Summary Statistics

  • 21427 Total
    bridges
  • 13.53 Average
    Clearance
  • 15 Highest
    Clearance
  • 5.92 Lowest
    Clearance
data-stats
Additional

Other Statistics

Number of bridges by State

We provide a smart, easy-to-read map that shows where low clearance bridges are most common across the U.S. This is more than just a chart—it’s a tool for drivers who need to avoid trouble on the road. If you drive a truck or manage deliveries, this map helps you plan smarter. Need to find bridges in my area? Want to check bridge height clearance before heading out? It’s all here. You’ll save time, avoid unexpected stops, and skip detours caused by surprise low bridges. Low Clearance Map has done the work, so you don’t have to.

Number of Bridges by Country

The USA 92.2%
The UK 5.8%
Canada 2.0%
Mexico 0.0%
We also show you how bridge clearance for trucks compares between the USA, Canada, the UK, and Mexico. If you cross borders for work, you know how different the roads can be. That’s why we help you spot highway bridge trouble before you get there. With this info, you can plan long routes without guessing. Maybe your trip takes you past an old tunnel in England or a tight overpass in Quebec—we give you a clear view so you’re not caught off guard. We make cross-country and cross-border trips less stressful, with all the right details upfront.

Distribution of Clearance Heights

We break down the actual height clearance of bridges so you know exactly what you’re dealing with. Most fall between 10 and 14 feet, but a few are under 8 feet. That’s a problem if your vehicle is near the average bridge height. Even being off by an inch can do real damage. Our map doesn’t just tell you where the Low Clearance bridges are—it shows you how low they are. That means less guessing and more confidence, especially when driving through unfamiliar areas.

Distribution of Hazard Headings

We include road Hazard Headings to help you understand which direction a bridge affects. For example, if the heading is 180, that means vehicles going north or south(or south to north) will pass under it. This helps cut down on false alerts. If you're setting up geofencing or planning a route, you only get warnings that match the direction you're actually driving. We provide this info so your routes are more accurate and your trip goes smoother.

Number of Bridges by State

Some states have more bridges than others. But it’s not just the number that matters—it’s how low they are. Even if there are only a few bridges, just one with very Low Clearance can cause serious trouble. Our map combines both— Low Clearance bridges and the number of bridges—so you see the full picture. This helps drivers, dispatchers, and fleet managers plan safer routes across state lines. We give you the info that matters when planning long trips. Don’t just hope the clearance is fine—check it ahead of time with our help.
common questions

FAQ

What is Low Clearance? arrow top black icon

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.

How does Low Clearance Map support bridge clearance for trucks? arrow top black icon

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.

How accurate is the data? arrow top black icon

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.

How often is the data updated? arrow top black icon

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.

Do you offer a free version? arrow top black icon

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. The plan includes unlimited truck and RV routing, and Google Maps integration, with no long-term commitment required.

What’s included in commercial access? arrow top black icon

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.

What are Hazard Headings? arrow top black icon

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.

What regions do you cover? arrow top black icon

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.