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1980s

This spacer graphic supplies white space to align other elements.Nation's largest concrete segmental bridge opens, the Zilwaukee Bridge carrying I-75 over the Saginaw River.






 

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1984
The 50 millionth vehicle crosses the Mackinac Bridge

1984
World's first unrestricted, public-use microwave landing system begins operating at Wexford County Airport in Cadillac

1986
MDOT institutes "smiley-face" road signs in construction zones

1988
Nation's largest concrete segmental bridge opens - Zilwaukee Bridge carrying I-75 over the Saginaw River.

MDOT takes computers to construction field offices for the first time when it implements the Construction Project Record Keeping System (CPRKS).

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