Orthotropic bridges
A stiffened steel plate deck that acts together with the supporting girders, used on long-span bridges. The inventory lists 34 of them, 0.01% of all US bridges.
- Bridges
- 34
- Share of all bridges
- 0.01%
- Poor condition
- 29.4%
- 10 bridges
- Average age
- 45.3 yrs
- Combined length
- 11 mi
- Oldest
- 1841
Orthotropic bridges by state
| State | Orthotropic | Share of state's bridges |
|---|---|---|
| Texas | 6 | 0.01% |
| Alaska | 5 | 0.3% |
| Arkansas | 4 | 0.03% |
| California | 4 | 0.02% |
| Illinois | 3 | 0.01% |
| Arizona | 2 | 0.02% |
| Louisiana | 1 | 0.01% |
| Michigan | 1 | 0.01% |
| Montana | 1 | 0.02% |
| New Jersey | 1 | 0.01% |
| New York | 1 | 0.01% |
| Oklahoma | 1 | 0.00% |
| Pennsylvania | 1 | 0.00% |
| Rhode Island | 1 | 0.1% |
| Puerto Rico | 1 | 0.04% |
| Connecticut | 1 | 0.02% |
Materials used
| Steel | 70.6% |
| Steel Continuous | 26.5% |
| Wood or Timber | 2.9% |
When they were built
Busiest
- State Route 92 over San Francisco BayPoorSan Mateo County, California · 120,000 vehicles/day
- Psb I-55 64;US 40 over Mississippi RiverFairSt. Clair County, Illinois · 113,200 vehicles/day
- State Route 75 over San Diego Bay Harbor DRFairSan Diego County, California · 85,000 vehicles/day
- US 90A over S Gessner RDGoodFort Bend County, Texas · 79,622 vehicles/day
- Broad Street over SEPTAFairPhiladelphia County, Pennsylvania · 58,754 vehicles/day
Longest
- State Route 92 over San Francisco BayPoorSan Mateo County, California · 36,069 ft
- State Route 75 over San Diego Bay Harbor DRFairSan Diego County, California · 7,826 ft
- Ill 9 over Illinois River T&p RRFairTazewell County, Illinois · 2,634 ft
- Dalton Highway over Yukon RiverFairYukon-Koyukuk Census Area, Alaska · 2,295 ft
- Psb I-55 64;US 40 over Mississippi RiverFairSt. Clair County, Illinois · 2,165 ft
Oldest
- Route 128 over Housatonic RiverFairLitchfield County, Connecticut · Built 1841
- Broad Street over SEPTAFairPhiladelphia County, Pennsylvania · Built 1921
- Clark Street over Toneys BrookFairEssex County, New Jersey · Built 1922
- Ri 117 Cntrvlle RD over Wash Sec Bike PathFairKent County, Rhode Island · Built 1959
- Psb I-55 64;US 40 over Mississippi RiverFairSt. Clair County, Illinois · Built 1963