[3] Until 1998, the bridge was open to motor vehicles and carried U.S. Route 80 (US 80) across the Mississippi River.

Located at each end of the bridge were railroad-style signal towers that required trucks to stop on command.

Prior to installation of the towers trucks were allowed to traverse the bridge alongside other passenger and train traffic.

Once put in place the towers effectively closed off traffic for all vehicles in both directions to allow trucks to cross the bridge alone, using the full width of both of the narrow lanes.

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