MI HB5286

Authorizes use of flashing lights and illuminated changeable digital messages on speed limit signs in work zones where workers are present, displaying speed limits in numerical format.

Defines "present" as workers located in proximity to a roadway not protected by guardrail or barrier for purposes of activating variable speed limit displays.

Maintains existing speed limit framework including 45 mph default in work zones unless engineering determines different limit is appropriate.

Requires speed limit signs in work zones to conform to Michigan manual on uniform traffic control devices.

Takes effect immediately upon Governor's approval on March 29, 2022.