North of the K-32 interchange, 18th Street passes over another rail yard, this one belonging to Union Pacific. On the northern edge of this rail yard lies I-70. 18th Street provides access to this highway via a traditional cloverleaf interchange. This interchange, Exits 420A–B from I-70, also serves as the official eastern terminus of the Kansas Turnpike, though the actual tolled section ends further west. The expressway ends at I-70, with northbound US-69 joining I-70 eastbound in a concurrency. North of this interchange, the mainline drops the word "Expressway" from its title to become 18th Street. It continues north as a typical urban arterial.