I-94 (Ford Freeway)
From Detroit (heading West)

Take State Street Exit 177. Turn right (north). Continue on State Street approximately 2 miles to the main campus area. The Michigan Union is on your left at the South State Street and South University intersection.

I-94 (Ford Freeway)
From Chicago (heading East)

Take State Street Exit 177. Turn left (north). Continue on State Street approximately 2 miles to the main campus area. The Michigan Union is on your left at the South State Street and South University intersection.

US-23
From Ohio (heading North)

Take Washtenaw-Ann Arbor Exit 37B and turn right (west) onto Washtenaw. At the fork in the road where Stadium Boulevard and Washtenaw Avenue split (approximately 2-3 miles), stay to the right on Washtenaw following the Hospital signs. Take a left at Hill Street (you'll see "The Rock"). Continue down Hill Street (campus buildings will be on your right). Take a right on State Street. Go two blocks. The Michigan Union is on your left at the South State Street and South University intersection.

US-23
From Northern MI (heading South)

Take US-23 South to M-14 West. Follow m-14 West signs closely. At the fork, stay to the left following the "Ann Arbor" signs. Take the second exit after the fork, Exit #3, called Downtown Ann Arbor exit, this will become Main Street. Follow Main Street to William Street. Take a left at William Street Continue down William Street until it ends at State St. Take a right on State Street. Go one block. The Michigan Union is on your right at the intersection of South State Street and South University.

I-696 (W.P. Ruether Freeway)
From Northwest Suburbs

Take I-696 to I-275 South to M-14 West. Follow M-14 West signs closely. At the fork, stay to the left following the "Ann Arbor" signs. Take the 2nd exit after the fork, Exit #3, called "Downtown Ann Arbor"; this will place you on Main Street. Follow Main Street to Hill Street. Continue on Hill Street until State Street intersects. Make a left on State Street to head towards the Michigan Union. The Michigan Union is on your left at the South State Street and South University intersection.

I-96 (also called the Jeffries Freeway)
From Parts of Detroit, Redford, M-14, Plymouth and Canton

Take I-96 to M-14 West. Follow M-14 West signs closely as by Ann Arbor it forks to the left. Take the second exit after the fork, Exit #3, which is marked "Downtown Ann Arbor"; this will place you on Main Street. Follow Main Street to Hill Street. Turn left on Hill Street until State Street intersects. Take a left on State Street to head towards the Michigan Union. The Michigan Union is on your left at the South State Street and South University intersection.

(Shamelessly borrowed from the U-M web site, because they force it to pop-up in a new framed window)