The 25 lowest posted clearances
| # | Posted | Structure | City |
|---|---|---|---|
| 1 | 6'0" | Low clearance underpass (service) | Indianapolis, IN |
| 2 | 6'0" | Low clearance: Lick Run under Harrison Ave | Cincinnati, OH |
| 3 | 6'0" | Low clearance underpass (service) | Milwaukee, WI |
| 4 | 6'0" | Low clearance underpass (service) | Boston, MA |
| 5 | 6'0" | Tunnel (service) | Cambridge, MA |
| 6 | 6'0" | Low clearance: MILL BROOK under BRIDGTON RD | Portland, ME |
| 7 | 6'0" | Low clearance underpass (service) | Manchester, NH |
| 8 | 6'0" | Tunnel (service) | Niagara Falls, NY |
| 9 | 6'0" | Low clearance underpass (service) | Anchorage, AK |
| 10 | 6'0" | Low on-bridge clearance: Renton Road | Honolulu, HI |
| 11 | 6'0" | Low clearance: Miami Canal C-6 under WB SR 948(NW 36th) | Miami, FL |
| 12 | 6'0" | Low clearance — Shingle Road | Chattanooga, TN |
| 13 | 6'0" | Low clearance underpass (service) | Houston, TX |
| 14 | 6'0" | Low clearance underpass (service) | Las Vegas, NV |
| 15 | 6'2" | Low clearance underpass (service) | Chicago, IL |
| 16 | 6'2" | Low clearance underpass (service) | St. Louis, MO |
| 17 | 6'2" | Low clearance underpass (service) | New York, NY |
| 18 | 6'2" | Low clearance underpass (service) | Las Vegas, NV |
| 19 | 6'3" | Low clearance — West Garage Entrance | Chicago, IL |
| 20 | 6'3" | Low clearance underpass (service) | Boston, MA |
| 21 | 6'3" | Tunnel (service) | Cambridge, MA |
| 22 | 6'3" | Fort Duquesne Bridge (I-279) | Pittsburgh, PA |
| 23 | 6'3" | Low clearance underpass (service) | Fort Worth, TX |
| 24 | 6'3" | Tunnel (service) | Fort Worth, TX |
| 25 | 6'3" | Low clearance underpass (service) | Las Vegas, NV |
Posted clearance as recorded from OpenStreetMap, the FHWA National Bridge Inventory, or AI-verified Street View signage. Posted numbers can change with re-paving and re-signage — always trust the sign in front of you over any database, including this one.
The lowest bridge in every covered state
| State | Posted | Structure | City |
|---|---|---|---|
| Indiana | 6'0" | Low clearance underpass (service) | Indianapolis, IN |
| Ohio | 6'0" | Low clearance: Lick Run under Harrison Ave | Cincinnati, OH |
| Wisconsin | 6'0" | Low clearance underpass (service) | Milwaukee, WI |
| Massachusetts | 6'0" | Low clearance underpass (service) | Boston, MA |
| Maine | 6'0" | Low clearance: MILL BROOK under BRIDGTON RD | Portland, ME |
| New Hampshire | 6'0" | Low clearance underpass (service) | Manchester, NH |
| New York | 6'0" | Tunnel (service) | Niagara Falls, NY |
| Alaska | 6'0" | Low clearance underpass (service) | Anchorage, AK |
| Hawaii | 6'0" | Low on-bridge clearance: Renton Road | Honolulu, HI |
| Florida | 6'0" | Low clearance: Miami Canal C-6 under WB SR 948(NW 36th) | Miami, FL |
| Tennessee | 6'0" | Low clearance — Shingle Road | Chattanooga, TN |
| Texas | 6'0" | Low clearance underpass (service) | Houston, TX |
| Nevada | 6'0" | Low clearance underpass (service) | Las Vegas, NV |
| Illinois | 6'2" | Low clearance underpass (service) | Chicago, IL |
| Missouri | 6'2" | Low clearance underpass (service) | St. Louis, MO |
| Pennsylvania | 6'3" | Fort Duquesne Bridge (I-279) | Pittsburgh, PA |
| New Jersey | 6'4" | Tunnel (service) | Jersey City, NJ |
| California | 6'4" | Tunnel (service) | Los Angeles, CA |
| Michigan | 6'5" | Low clearance underpass (service) | Detroit, MI |
| Georgia | 6'5" | Tunnel (service) | Atlanta, GA |
| Washington | 6'6" | Tunnel (service) | Seattle, WA |
| Arizona | 6'6" | Low clearance underpass (service) | Scottsdale, AZ |
| Montana | 6'6" | Low clearance underpass (service) | Missoula, MT |
| Utah | 6'6" | Tunnel (service) | Provo, UT |
| Maryland | 6'7" | Low clearance underpass (service) | Baltimore, MD |
| Virginia | 6'10" | Low clearance underpass (service) | Richmond, VA |
| Colorado | 6'10" | Low clearance underpass (service) | Grand Junction, CO |
| Iowa | 7'0" | Low clearance: BR MUD CREEK under LOCAL | Cedar Rapids, IA |
| Minnesota | 7'0" | Tunnel (service) | Minneapolis, MN |
| North Dakota | 7'0" | Low clearance underpass (service) | Bismarck, ND |
| Nebraska | 7'0" | Low clearance underpass (service) | Omaha, NE |
| Oregon | 7'0" | Low clearance — Fox Tower Parking | Portland, OR |
| Alabama | 7'0" | Low clearance underpass (service) | Birmingham, AL |
| North Carolina | 7'0" | Tunnel (service) | Durham, NC |
| Oklahoma | 7'0" | Tunnel (service) | Tulsa, OK |
| Rhode Island | 7'5" | Low clearance: India Pt Bike Path under India Street | Providence, RI |
| Puerto Rico | 7'6" | Low clearance: UNNAMED CREEK under CALVE STREET | San Juan, PR |
| West Virginia | 7'6" | Low on-bridge clearance: WV Route 251 | Wheeling, WV |
| South Dakota | 8'0" | Low clearance underpass (service) | Sioux Falls, SD |
| Connecticut | 8'0" | Low clearance — Merritt Parkway (CT 15) | Bridgeport, CT |
| Vermont | 8'0" | Low clearance — Boynton Street | Montpelier, VT |
| Arkansas | 8'0" | Low on-bridge clearance: Orr Road | Fayetteville, AR |
| Idaho | 8'0" | Low clearance: CDA PARKING GARAGE under FRONT AVENUE | Coeur d'Alene, ID |
| Louisiana | 8'2" | Low clearance underpass (service) | New Orleans, LA |
| Kentucky | 8'6" | Low clearance — Old Eastern Parkway | Louisville, KY |
| South Carolina | 8'6" | Low clearance underpass (service) | Myrtle Beach, SC |
| Delaware | 9'0" | Low clearance: RIVERWALK PATH under NEW SWEDEN ST | Wilmington, DE |
| New Mexico | 9'0" | Low clearance underpass (service) | Santa Fe, NM |
| Wyoming | 9'0" | Low clearance underpass (service) | Cheyenne, WY |
| District of Columbia | 9'9" | Low clearance: PARKING LOT CONNECTOR under SOUTH GLEBE ROAD | Washington, DC |
| Mississippi | 10'8" | Low clearance — South Gallatin Street | Jackson, MS |
| Kansas | 12'9" | Low clearance — East Douglas Avenue | Wichita, KS |
Frequently asked questions
What is the lowest bridge in America?
Among the 7,265 low-clearance bridges, underpasses, and tunnels tracked by WillIFit.ai, the lowest posted clearance is 6'0" at Low clearance underpass (service) in Indianapolis, IN. Posted clearances nationwide vary widely by region and structure age; always trust the sign in front of you over any database.
How many low-clearance bridges does WillIFit.ai track?
WillIFit.ai tracks 7,265 bridges, underpasses, and tunnels posted between 6' and 14' across 52 US states and territories, sourced from the FHWA National Bridge Inventory, OpenStreetMap, and AI-verified readings of posted Street View signage.
What vehicles are at risk from low bridges?
Any vehicle taller than about 11'6" is at meaningful risk nationwide: standard box trucks run 12'6" to 13'6", moving trucks and RVs commonly reach 13'6", and even high-roof cargo vans (roughly 9'6") can strike older, lower urban underpasses. Bridge strikes are almost always preventable by checking posted clearance before routing a tall vehicle.
Methodology
WillIFit.ai tracks 7,265 low-clearance bridges, underpasses, and tunnels (posted between 6' and 14') across 226 US cities, sourced from the FHWA National Bridge Inventory, OpenStreetMap, and our own AI verification of posted signage in Google Street View. This page is regenerated from the live database; figures reflect posted signs as recorded, which are often set below true clearance as a safety margin. Structures posted under 6' are excluded as likely pedestrian or culvert records. See a bridge we're missing? Open the map and report it.
Planning a route in a tall vehicle? Check your height against every garage, tunnel, and bridge in 226 cities, or read the parking garage clearance guide.