U.S. Federal Route 51 is a north-south highway in Eastern Washington County. It runs on a expressway from Interstate 64 to the Marion/Washington/Jefferson County Line. U.S. Rt. 51 passes through the following towns in Washington County. Ashley
NB U.S. Rt. 51 near Ashley. A BGS on WB I-64. NB U.S. Rt. 51 on the expressway north of I-64. A Washington County mile marker. A guide BGS on IL St Rt 177. NB U.S. Rt. 51 north of Irvington.