State Route 308 (SR 308) is a
state highway
A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either ''numbered'' or ''maintained'' by a sub-national state or province. A road numbered by a ...
in the
U.S. state of
Washington, serving the community of
Keyport in
Kitsap County. The highway travels generally east from an interchange with
SR 3 east of
Naval Base Kitsap at
Bangor to the main entrance of the
Naval Undersea Warfare Center in
Keyport. SR 308 was codified as the Keyport branch of
State Road 21 in 1929 and continued as the Keyport branch of
Primary State Highway 21 (PSH 21) in 1937. During the
1964 highway renumbering, the branch became a section of
SR 303, which ran from
Bremerton to Bangor and had a spur route serving Keyport. SR 308 was established in 1971 along the old route of SR 303 Spur and was extended in 1991 to the SR 3 freeway after SR 303 was re-routed onto a new freeway in
Silverdale.
Route description
SR 308 begins as Luoto Road at a
diamond interchange with
SR 3 east of
Naval Base Kitsap at
Bangor.
The highway travels east through wooded land, intersecting several minor roads until the roadway turns northeast and crosses over
Liberty Bay into the
unincorporated community of
Keyport. Within Keyport, SR 308 passes the
Naval Undersea Museum and serves as the main thoroughfare through the community before it ends at the main entrance to the
Naval Undersea Warfare Center, continuing east as Strom Avenue into the base.
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 the highway was between SR 3 and Liberty Bay, serving 11,000 vehicles, while the least busy section was the bridge over Liberty Bay, serving 6,300 vehicles.
History
The current route of SR 308 was first added to the state highway system in 1929 as the
Keyport branch of
State Road 21 and was carried over to the
primary and secondary state highway system in 1937 as a branch of
PSH 21.
The branch traveled east from PSH 21 near
Naval Submarine Base Bangor to the
Naval Undersea Warfare Center in
Keyport, intersecting
Secondary State Highway 21B (SSH 21B) before crossing
Liberty Bay.
The Keyport branch was incorporated into
SR 303, which replaced SSH 21B,
with a short
spur route
A spur route is a short road forming a branch from a longer, more important road such as a freeway, Interstate Highway, or motorway. A bypass or beltway should not be considered a true spur route as it typically reconnects with another or the s ...
serving Keyport.
SR 308 was established in 1971 to replace the Keyport spur of SR 303 and extended over SR 303 in 1991 to SR 3 after SR 303 was moved south to end in
Silverdale.
Major intersections
References
External links
Highways of Washington State
{{State highways in Washington related to SR 3
308
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Year 308 ( CCCVIII) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. It was known in the Roman Empire as the Year of the Consulship of Diocletian and (Galerius) Maximianus (or, less ...
Transportation in Kitsap County, Washington