UPDATE - (WZZM) - As of 1:00pm, crews have reopened northbound US-31.
Police are informing motorists involved in crashes to proceed to the next exit to report the accident and to get off of the highway.
MUSKEGON, Mich. (WZZM) - Northbound US-31 is closed near the I-96 and Hile Road exits due to numerous crashes and snowy driving conditions.
There are reports of a Norton Shores Police vehicle being involved in one crash.
We'll have more updates when they become available.