MP: 25.09 Location: SE Maple Valley Hwy and I-405, Renton Reassurance shield after the I-405 junction   MP: 13.14 Location: Renton-Maple Valley Rd SE and SE 232nd St, Maple Valley You can get to SR 18 by turning right onto 232nd street and the ramps S to SR 516, N to SR 900   W … Continue reading State Route 169, I-405 to SR 18