Navy Yard City, serving the city of Bremerton and Naval Station Bremerton. The freeway continues through western Bremerton past the diamond interchange with SR 310 and the community of Chico along Dyes Inlet. SR 3 travels west of Silverdale past the western terminus of SR 303 at the Kitsap Mall and east of Naval Submarine Base Bangor in Bangor. The freeway continues north towards Poulsbo past the termini of SR 308 and SR 305, which serve Keyport and Bainbridge Island respectively. SR 3 travels north from Poulsbo as a two-lane road towards Port Gamble and ends at the eastern approach of the Hood Canal Bridge at an intersection with SR 104. Every year, the Washington State Department of Transportation (WSDOT) conducts a series of surveys on its highways in the state to measure traffic volume. This is expressed in terms of average annual daily traffic (AADT), which is a measure of traffic volume for any average day of the year. In 2011, WSDOT calculated that the busiest section of SR 3 was between SR 16 in Gorst and SR 304 in Navy Yard City, serving 69,000 vehicles, while the least busiest section was southwest of Allyn-Grapeview at an intersection with Grapeview Loop Road, serving 6,600 vehicles. SR 3 is designated as a STRAHNET corridor within National Highway System, connecting Naval Base Kitsap to the state highway system between Gorst and Bangor, while the rest of the highway is part of the system, which includes roadways important to the national economy, defense, and mobility. WSDOT designates the entire route of SR 3 as a Highway of Statewide Significance, which includes highways that connect major communities in the state of Washington. History SR 3 follows the route of a paved section of State Road 21 between Belfair and Port Gamble on the Kitsap Peninsula that was added to the state highway system in 1915. The highway was later split between the Navy Yard Highway from Belfair to Bremerton and State Road 21 from Bremerton to Port Gamble in 1919. In 1923, the state highway system was restructured and the Navy Yard Highway was numbered as State Road 14, while State Road 21 kept its designation. The Navy Yard Highway, an unpaved highway connecting Union to Charleston, was dedicated on June 12, 1923. During the creation of the primary and secondary state highway system in 1937, the paved State Roads 14 and 21