 On July 1, 2003, between Dexter and Adel were turned over to Dallas County.US 6, which had previously split away from I-80 at the Dexter exit, was continued along I-80 to the US 169 interchange at De Soto, and then along US 169 to Adel.The former segments, Iowa 925 and Iowa 927, were turned over to their respective counties as well.