Madison County: Traffic Signal Changes – Illinois Route 143 March 2 – April 18, 2026

WOOD RIVER – The Illinois Department of Transportation today announced traffic impacts near the Phillips 66 refinery’s north entrance along IL 143. Beginning March 2, local law enforcement will change the traffic signal located at IL 143 and the Schnuck’s entrance to red flash between the hours of 4:00 a.m. and 8:00 a.m. as well as 4:00 p.m. and 8:00 p.m., daily through April 18.

These adjustments are necessary to facilitate safe, efficient traffic flow during shift change at the refinery during this heavy construction period. Several hundred vehicles will be entering and exiting the refinery’s north access point approximately 0.5 miles west of IL 255 during the refenced periods of signal adjustment.

Motorists can expect delays and should allow extra time for trips through this area. Drivers are urged to pay close attention to changed conditions, traffic signals, and signs in the work zones, obey the posted speed limits, refrain from using mobile devices, respect law enforcement directions, as well as be alert for workers and equipment.

For IDOT District 8 updates, follow us on the social media platform X at @IDOTDistrict8 or view area construction details on IDOT’s traveler information map on GettingAroundIllinois.com.

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