Expansion joint on the Mackinac Bridge

Looking north over the driving surface of the south approach the one of the many "finger" type expansion joints is visible.  Also visible in the center right is one of the State of Michigan car ferries, with it's days of service at the straits numbered., Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Looking north over the driving surface of the south approach the one of the many "finger" type expansion joints is visible. Also visible in the center right is one of the State of Michigan car ferries, with it's days of service at the straits numbered.
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1957 (approximate)