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Interstate 675 Michigan

 

Routing

Interstate 675 provides the business route into Saginaw from Interstate 75. Interstate 675 was built as a way to get around a drawbridge. On Interstate 75, between the two termini of Interstate 675, there used to be a drawbridge where Interstate 75 crossed the Saginaw River. Interstate 675 was built, in part, as a way to avoid this drawbridge, particularly for people driving to and from northern Michigan from metro Detroit. The drawbridge was eventually replaced by the fixed span Zilwaukee Bridge (known locally as the Z-Bridge). Thanks to Geoff Hatchard for this information.

Zilwaukee Bridge

Don Hargraves adds more information about the Zilwaukee Bridge:

  1. The old Zilwaukee bridge was well known as a bottleneck for a few reasons. One of them was that it was a drawbridge, another was that for many years I-75 was 6-laned from Flint to just below the Zilwaukee bridge, where it shrank down to four lanes for the bridge. After that, it went back to six lanes to north of Bay City.
  2. The reason the old Zilwaukee bridge was a drawbridge was because of a General Motors plant on the Saginaw side of the bridge that used the river for steel shipments. At the time the Zilwaukee bridge was being replaced by the present structure, General Motors stopped using the river for steel shipments.
  3. There was a mini-disaster with one of the pylons that held the bridge up above the river during construction. The bridge is okay now, but for years after the new bridge opened you saw bumper stickers that said "I drove over the Zilwaukee Bridge AND LIVED!"
  4. The new Zilwaukee Bridge is eight lanes wide. A bit wide, but better too wide than too narrow (as the drawbridge was).

History

Designated in 1969, Interstate 675 was completed by 1971.1

Southern Terminus - Interstate 75 - Saginaw, Michigan
Southbound Interstate 75 at southern terminus of Interstate 675 in Saginaw. Photo by Eric Vander Yacht.
Northern Terminus - Interstate 75 - Zilwaukee, Michigan
Northern Terminus of Interstate 675 in Zilwaukee (#1). Photo by Thai Williams.
Northern Terminus of Interstate 675 in Zilwaukee (#2). Photo by Eric Vander Yacht.
Northbound Interstate 75 approaching northern terminus of Interstate 675 in Zilwaukee. Photo by Eric Vander Yacht.
Southbound Interstate 75 approaching northern terminus of Interstate 675 in Zilwaukee (#1). Photo by Eric Vander Yacht.
Southbound Interstate 75 at northern terminus of Interstate 675 in Zilwaukee (#2). Photo by Eric Vander Yacht.

Sources:

  1. Michigan Highways: Highways 250 through 696 (Chris Bessert).

Page Updated September 25, 2002.

 
Mileage

State Michigan
Mileage 7.72
Cities Saginaw
Junctions Interstate 75, Interstate 75
Source: October 31, 2002 Interstate Route Log and Finders List
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