illinois  runs concurrently for one block with illinois route  in elk grove township and illinois route  and us highway  by starks an unincorporated village approximately  miles  km from chicago the latter is a wrong-way concurrency where one can be driving both west on illinois  and east on us  at the same time west from chicago illinois  largely parallels interstate  until starks crossing over and under the highway six times without an intersection on a larger scale it is the main east–west artery to chicago between interstate  and illinois route 