Interstate 675 (Michigan)

Splitting from I-75/US 23 on the eastern side of Saginaw, I-675 turns west toward downtown. The freeway runs between residential neighborhoods and has an interchange with Veterans Memorial Parkway. West of that interchange, From there, it runs on the northern edge of downtown near the Dow Event Center, spanning the Saginaw River on the Henry G. Marsh Bridge. On the west side of the river, the trunkline meets an interchange with M-58. From there it turns northward, The entire length of the freeway has four lanes (two in each direction). As an Interstate Highway, all of I-675 is listed on the National Highway System. ==History==

I-675 was initially planned in the mid-1950s, and the Michigan State Highway Department (MSHD) originally proposed the number I-275 for the freeway through Saginaw in 1958, while the MSHD proposed an I-73 number for what is now I-275. The state started construction on I-675 in 1969. The freeway was to provide access to the downtown Saginaw area and serve as a bypass for the original Zilwaukee Bridge northeast of downtown, roles that continue today. At the time, the Zilwaukee Bridge was a bascule bridge that could be raised to allow shipping traffic to use the Saginaw River. Opening the drawbridge would back traffic up on the freeway for up to four hours on holiday weekends. I-675 helped relieve the congestion during such times. The record was a traffic jam on Labor Day 1968, although backups were common until the shipping companies using the Saginaw River limited their traffic in 1970. The freeway was completed in 1971 and opened to traffic that year. After completion, the state considered reconstructing I-675 to make the downtown freeway the through routing for I-75/US 23 in the Saginaw area to bypass the bascule bridge. Originally to be completed in 1983, the replacement bridge on I-75/US 23 finally opened on September 19, 1988. The next year, southbound I-675 was used to divert traffic around a temporary closure on the southbound span of the Zilwaukee Bridge. At the same time, northbound I-675 was closed while crews replaced the deck on the bridge over the Saginaw River. In 2002, the Zilwaukee Bridge was closed for a few months for joint repair work, and traffic was diverted onto I-675. The freeway through downtown was pressed back into service as a detour around the Zilwaukee Bridge for six months in 2008 as a mishap involving several steel reinforcement rods during a maintenance project closed that structure for an extended period of time. Then, starting in May 2009 and ending in November 2011, sections of I-675 were closed from exit 2 easterly to begin renovations during the summer construction seasons. These projects included rehabilitation of the Henry G. Marsh Bridge, the reconstruction of overpasses, and a redesigned exit at Warren Avenue to ease access into downtown Saginaw. The project cost $42 million (equivalent to $ in ). ==Exit list==