State Route 303, named Warren Avenue, begins at an intersection with Burwell Street, signed as, north of the Puget Sound Naval Shipyard in Bremerton. Warren Avenue travels north through Bremerton and serves Olympic College before crossing the Port Washington Narrows on the Warren Avenue Bridge. The highway intersects Clare Avenue and Callahan Drive in a partial cloverleaf and diamond interchange. In East Bremerton, the roadway becomes Wheaton Way and continues north through suburban areas and intersects Sheridan Road, a spur route of SR 303 prior to 1991. SR 303 passes View Ridge Elementary and Sylvan Way, the former SR 306 serving Illahee State Park, before leaving Bremerton. The highway turns west at an intersection with its former route, the Brownsville Highway, and becomes a grade-separated freeway named Waaga Way. The freeway intersects Central Valley Road in a partial cloverleaf interchange and turns northwest to intersect Ridgetop Boulevard in a diamond interchange. Waaga Way travels around the Kitsap Mall and interchanges with Silverdale Way before intersecting in Silverdale, continuing as Kitsap Mall Boulevard into the city center. The entire highway is part of the National Highway System and was used by a daily average of 42,000 vehicles in 2011.
History
The original route of SR 303, connecting Bremerton to Brownsville and Keyport first appeared on maps in 1933 as a gravel road. In 1937, the roadway was added to the state highway system as Secondary State Highway 21B, traveling from in Bremerton to PSH 21 at Naval Base KitsapBangor. A toll bridge across the Port Washington Narrows carrying Warren Avenue and SSH 21B was completed by the state government in November 1958. A branch of SSH 21B that served Illahee State Park was added in 1961, and became during the 1964 highway renumbering. SSH 21B became SR 303 in the same renumbering, however the segment from Keyport to Bangor became in 1971. A spur route of SR 303, serving the Manette Bridge, was also added to the highway system, but was removed in 1991. SR 303 was re-routed in 1991 onto the new Waaga Way grade-separated freeway bypass of Silverdale that was built in the late 1970s. No major revisions to SR 303 have been made since 1991, however the Manette Bridge is still maintained by the Washington State Department of Transportation and was rebuilt in November 2011. Recently, the Wheaton Way section of SR 303 in Bremerton has been remodeled, resulting in traffic on the Warren Avenue Bridge.
