Motorists are advised to use caution on Interstate 39 near Tonica, where a jacknifed semi caused a lane closure.
Illinois State Police Troop 2 reported at 9:37 a.m. Friday troopers are helping with a jackknifed tractor-trailer on I-39 northbound near milepost 45.5, south of Tonica, which is blocking the left lane.
There also is a semi in the left ditch of I-39 northbound near milepost 50, about 2 miles north of the Tonica exit, that is waiting for a tow truck, state police said.