MP: SR 99/15.43 Location: Pacific Hwy S and Kent-Des Moines Rd, Des Moines SR 509 will turn left towards Des Moines, briefly joining SR 516. It is unsigned, obviously     N to SR 516, S to I-705    N to SR 518, S to SR 18     N to SR 518, S to … Continue reading State Route 509, SR 99 to SR 99/SR 516