MP: 5.84 Location: NE 117th Ave and NE Fourth Plain Blvd, Vancouver “JCT” SR 503 coming up. What this really means is that SR 503 will appear out of thin air following this stoplight. It didn’t used to be this way. SR 500 used to turn right here and follow Fourth Plain Blvd. SR 503 … Continue reading State Route 500, I-205 to SR 503