The most complete low-clearance bridge database in the world.
The largest, most accurate, and best maintained low-clearance dataset anywhere. 26,000+ verified structures across the U.S., U.K. and Canada, and the same data our own routing runs on.
Choose the access that fits your workflow
The API is self-serve: pick a plan, add a card, and your key is issued in about a minute. The Database Portal and full-database access are annual licences, so those start with a conversation. You can use either, or both.
Which option is right for you?
| Database Portal | API Suite | |
|---|---|---|
| Best for | Analysts, ops & planning teams | Engineers & product integrations |
| How you get it | Talk to us, annual licence | Self-serve, key in a minute |
| Pricing | $3,000 / year | From $75 / month |
| Free trial | No | 14 days |
| Access method | Secure web login | REST API key (X-Api-Secret) |
| Get the full dataset | Yes: CSV, Excel, JSON | Scale plan only |
| Route & clearance checks | No | Every plan |
| Filter & search visually | Yes, in-browser | Via query parameters |
| Route & radius lookups | No | Yes |
| Clearance-aware safe routing | No | Yes: Safe Route API |
| Change / diff reports | Built in | Build your own |
| Automation | Manual downloads | Fully programmatic |
| Setup effort | None, just log in | Light integration |
Available metadata
Every structure carries core location and clearance fields, plus a rich annotation layer built for height-critical routing decisions.
structure_typeThe kind of overhead structure- BR Bridge / overpass
- TRU Truss
- TUN Tunnel
- CVB Covered bridge
- OBS Other overhead obstruction
- OTH Other / unclassifiable
carriesWhat sits on top- ROAD Road / highway above
- RAIL Railroad above
- PED Pedestrian / bike only
- MIX Multiple or other
- N/A No road above
clearance_varWhere clearance is lowest- UNI Uniform (flat soffit)
- ARC Arched / center-high
- SLP Sloped / asymmetric
- STEP Stepped / separate spans
Two ways to begin
The API you can start yourself, right now. Data access is a licence, so that one starts with a conversation.
API: about a minute, no sales call
Create an account
Email and password, or sign in with Google. No phone verification, no forms to fill in.
Pick a plan and add a card
Starter begins with 14 days free and your card is not charged until the trial ends. Cancel any time before then.
Copy your key and go
Your key is shown once, with a working example. Manage it, see your usage and change plans in account settings.
Database Portal & full-database access
Tell us about your use case
Send a quick note using the form below, with a sentence on how you plan to use the data.
We agree terms
Bulk data is licensed annually. We confirm scope and pricing, and you sign a licensing agreement.
We provision your access
Your portal login is enabled, and if your licence includes the database endpoints, your API key is scoped for them.
Let’s get your team set up
Tell us a little about what you need and we’ll get back to you, usually within one business day, with access details and pricing tailored to your use case.
- Email us directly at info@lowclearancemap.com
- Already a portal subscriber? Log in here
- Just need the API? Start a free trial without waiting for us, or read the API reference first
Commercial access inquiry
Fields marked * are required.