| Special Bridge Conditions Legend |
| ! | Confirmed demolition date within one year or an especially historic bridge that is threatened with demolition at any level. |
| X | The bridge has been confirmed demolished or collapsed. |
| S | The bridge has been dismantled or moved to an offsite location and is not currently available for public viewing. |
| L | Most or all of the original bridge material has been demolished and replaced, including historically significant elements, but some original parts of the bridge remain. |
| Note: This website cannot guarantee the current condition of any bridge on this website. Bridges lacking these icons should not necessarily be considered condition-free. |
| Bridge Name | HSR Rating | Facility Carried / Feature Intersected | Location | Structure Type | Structure Dimensions | Construction Date / Builder or Contractor | Description | Thumbnail |
Ambassador Bridge
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 | I-75 Ramp / KH-3 Over Detroit River | Detroit and Windsor: Wayne County, Michigan and Essex County, Ontario | Metal Pony Truss Stiffening Wire Cable Suspension, Fixed |
Total Length: 7500 ft Main Span Length: 1850 ft Roadway Width: 55 ft Main Spans: 1 |
1929 By: McClintic-Marshall Company of Pittsburgh, Pennsylvania and Modjeski and Masters | Serving as the centerpiece landmark for Detroit and Windsor, this privately-owned bridge was once the longest suspension bridge in the world. | 
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