Peoria County Highway R15 is a highway in the northwest corner of the county that goes north-south-east-west. PCH R15 passes through the following town in Peoria County. Elmore PCH R15 intersects the following local highways in Peoria County. Illinois State Route 78, at the Peoria/Strak County Line. Peoria County Highway D20, near Laura. U.S. Rt. 150, near Laura. Peoria County Highway D23, near Brimfield. Illinois State Route 78, near Brimfield.
