Mount Vernon drivers face overnight I-57 closures for Illinois 15 overpass work
Mount Vernon, IL – IDOT will divert I-57 traffic overnight June 1-3 near the city while crews place structural steel for the Illinois 15 overpass.
Drivers using Interstate 57 near Mount Vernon should expect overnight traffic diversions from June 1 through June 3, 2026, while crews place structural steel for the Illinois 15 overpass. Illinois Department of Transportation says the work window runs nightly from 7 p.m. to 7 a.m.
During the construction period, I-57 traffic will be routed through the Mount Vernon interchange. That makes this a practical late-night travel update for commuters, truckers, and anyone moving through the I-57/I-64 corridor.
The disruption is temporary and limited to the overnight work period. That should keep the impact narrower than a daytime shutdown, but drivers who use the interstate after dark should still allow extra time and watch for changing traffic patterns near the ramps.
The City of Mt. Vernon says the I-57/I-64 corridor is an important access point for business and freight movement, which is why even a short construction diversion can matter to local deliveries and shift workers. IDOT’s project map shows the interchange work as part of the broader Rebuild Illinois effort on the corridor.
If you travel through the area late at night, plan ahead and expect the diversion only during the scheduled overnight construction window.
