US-23 North will be closed until further notice at the Washtenaw/Livingston County line in Michigan, due to a semi hitting a bridge. The bridge is closed to all traffic on 8-Mile Road. US-23 North traffic is currently using the exit & entrance ramps to get around the damaged bridge, but traffic will be a nightmare for several months. The bridge will have to be replaced. Northbound lanes will be re-opened once the current structure is dismantled. If you can avoid this area, it is highly encouraged that you do so.
US-23 is now open in both directions after demo crews spent the night tearing down the 8 Mile Road bridge over the freeway. No word yet on how long it will take to build its replacement.
From MDOT's Twitter feed:
https://pbs.twimg.com/media/CdPQ1_ZXIAE24lw.jpg:large
EDIT: MDOT posted some pics on their Facebook page:
https://www.facebook.com/MichiganDOT/posts/10153884940189927
At least there are some options in Whitmore Lake to get around the road damage but it will add a good 15-20 minutes if you heading to/from Ann Arbor. I would imagine most of the traffic is taking Whitmore Lake Road (intact section of Old US 23, there are a lot of them between Ann Arbor and Flint), might be better just to loop around on Shore Drive to 9 Mile even though it's longer.
MDOT time-lapse video of the demo:
https://www.youtube.com/watch?v=LFU7mfXlQe8
A more famous section of 8 Mile Road follows the boundary between majority black Detroit and its white northern suburbs. However, this segment of 8 Mile Road is not connected to that one ; the road has a gap at Whitmore Lake just to the east of US 23.