MP: SR 500/6.91 Location: NE 117th Ave and NE Padden Pkwy, Vancouver This stretch of highway is signed and internally mileposted with SR 503 as part of it. SR 503 will dead end pretty soon, however.   MP: SR 500/6.02 Location: NE 117th Ave and Fourth Plain Blvd, Vancouver Continue straight for SR 500 West. … Continue reading State Route 503, SR 500 to SR 500