 Past Herington, K-4 continued east on US-50N (now U.S. Route 56) to Council Grove, where it then followed a series of now unnumbered roadways to rejoin its present alignment at Eskridge.From Eskridge to west of Topeka, K-4 was identical to its current routing; however, at the intersection of SW Auburn Road and SW 21st Street, where K-4 currently continues north to access Interstate 70, K-4 turned east, following SW 21st Street into Topeka.At Topeka Boulevard, K-4 turned north, following the street out of the city.