 The highway is generally four lanes wide with a landscaped median or center turn lane in some areas.The entire route is designated as part of the National Highway System, a network of roads identified as important to the national economy, defense, and mobility.The corridor is also served by buses operated by Everett Transit and Community Transit, including the Swift Green Line—a bus rapid transit route that began service in 2019 and runs every 10–20 minutes between stations on SR 527 with transit signal priority and other features.