| 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. |
| 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 | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date / Builder or Contractor | Description | Thumbnail |
Mackinac Bridge
| I-75 Over Straits of Mackinac | Mackinaw City and St. Ignace: Emmet County, Michigan and Mackinac County, Michigan | Metal Deck Truss Stiffening Cable Suspension, Stationary | 1957 By: American Bridge Company of New York, New York | The longest bridge in the western hemisphere, designed by David B. Steinman. | 
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