 Between 1968 and 1997, K-4 was aligned along US-75 between I-70/US-40 and US-24 and then US-24 in Topeka.In 1997, the Oakland Expressway, serving eastern Topeka, was opened and K-4 gained its current route through Topeka.On December 1, 1994, K-4's eastern terminus was truncated to US-59 in Nortonville.