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State Highways in Washington
Standard route signage in Washington
Map of Washington's highways
System information
Length	7,000 mi (11,000 km)
Notes	Defined by RCW 47.17; maintained by WSDOT
Highway names
Interstates	Interstate X (I-X)
US Highways	U.S. Route X (US X)
State	State Route X (SR X)
System links
State highways in Washington Interstate US State Scenic Pre-1964 1964 renumbering Former

The State Highways of Washington in the U.S. state of Washington comprise a network of over 7,000 miles (11,270 km) of state highways, including all Interstate and U.S. Highways that pass through the state, maintained by the Washington State Department of Transportation (WSDOT). The system spans 8.5% of the state's public road mileage, but carries over half of the traffic. All other public roads in the state are either inside incorporated places (cities or towns) or are maintained by the county. The state highway symbol is a white silhouette of George Washington's head (whom the state is named after).

System description

All state highways are designated by the Washington State Legislature and codified in the Revised Code of Washington (RCW), namely Chapter 47.17 RCW. These routes are defined generally by termini and points along the route; WSDOT may otherwise choose the details, and may bypass the designated points as long as the road serves the general vicinity. WSDOT's duties include "locating, designing, constructing, improving, repairing, operating, and maintaining" these state highways, including bridges and other related structures. Within cities and towns, the local governments are responsible for certain aspects of the streets maintained as parts of a state highway, including their grade and the portion not used for highway purposes. All routes, even Interstate and U.S. Highways, are defined as "state route number" plus the number; for instance, Interstate 5 is "state route number 5" and U.S. Route 395 is "state route number 395". Also included in the RCW are "state route number 20 north" (signed as State Route 20 Spur) and "state route number 97-alternate" (signed as U.S. Route 97 Alternate). Some other spurs, such as State Route 503 Spur, are defined as part of the main routes, as is U.S. Route 101 Alternate. WSDOT has also defined some spurs that mainly serve to provide full access between intersecting routes.

Although most state highways as defined by law are open to traffic, State Route 109 dead-ends at Taholah, State Route 501 has a gap in the middle, and State Routes 35, 168, 230, 276, and most of SR 171, 213, and 704, have not been constructed. Notable sections of state highways include the six crossings of the Cascade Range - the Columbia River Gorge (SR 14), White Pass (US 12), Chinook Pass (SR 410), Snoqualmie Pass (I-90), Stevens Pass (US 2), and the North Cascades Highway (SR 20). Of the 13 public road crossings of the Canada–US border in Washington, nine are on state highways. Major bridges include the Tacoma Narrows Bridge and three floating bridges: the Evergreen Point Bridge, Hood Canal Bridge, and Lake Washington Bridge. The Washington State Ferries, except the route to Sidney, British Columbia, were legally included in the state highway system in 1994; a new State Route 339 was created at that time for the passenger-only Seattle-Vashon Ferry. According to the Washington State Department of Licensing, ocean beaches are legally state highways with a general speed limit of 25 mph (40 km/h), many only open to vehicles between the day after Labor Day and April 14, but state law places the beaches under the control of the Washington State Parks and Recreation Commission and only designates them as "public highways".

Most state routes are numbered in a grid, with even-numbered routes running east–west and odd-numbered routes running north–south. Even two-digit routes increase from south to north in three "strips", with SR 4, SR 6, and SR 8 in the western part of the state, SR 14, SR 16, SR 18, and SR 20 along the Interstate 5 corridor, and SR 22, SR 24, SR 26, SR 28, and former SR 30 in the east. Odd numbers similarly increase from west to east, with SR 3, Interstate 5, SR 7, SR 9, SR 11, SR 17, SR 21, SR 23, SR 25, SR 27, and SR 31 following this general progression. (SR 19 was added in 1991, and lies west of SR 3; SR 35 and SR 41 are extensions of highways in adjacent states.) Three-digit routes (and SR 92 and SR 96) are usually numbered by taking the first one or two digits of a route it connects to and adding another digit or two. In some cases, instead of using the two-digit route's actual number, a number that would fit the grid is used instead. Three-digit routes have been numbered as follows:

History

After passing several early laws designating state roads starting in 1893, the Washington State Legislature created the State Highway Board in 1905 and appropriated funds to construct - but not maintain - twelve numbered "state roads" in sparsely settled areas of the state. (Main highways in more populated areas would continue to be entirely under county control, though sometimes built with 50% state aid.) Six of these highways were east–west crossings of the Cascades; others included a portion of Chuckanut Drive and a road around the west side of the Olympic Peninsula. Under a 1909 law, the State Highway Board surveyed a connected network of proposed state roads, The legislature added most of these routes to the state highway system in 1913, when they formed a two-tiered system of primary and secondary roads. Primary roads were completely controlled by the state, including maintenance, and received only names, while secondary roads kept their numbers and county maintenance. Unlike the earlier state roads, these primary roads mostly followed existing passable county roads.

A 1923 restructuring of the system reassigned numbers to almost all the primary state highways, which were soon marked on signs. In 1937, the old primary/secondary split was abolished, and a new system of primary and secondary state highways was created, all to be maintained by the state in the same manner. The old state roads all kept their numbers as new primary state highways, and secondary state highways were created as alphanumeric branches of those primary highways (for instance SSH 8D was a branch of PSH 8). The final renumbering was authorized by law in 1963 and posted in January 1964, when new "sign route" numbers were assigned that matched the inter-state systems and otherwise formed the present grid. Until 1970, these numbers coexisted with the older primary and secondary state highways, when the legislature adopted the sign route numbers as "state routes", finally eliminating all vestiges of the 1905 numbering.

The state legislature adopted new standards for designating state highways in 1990, following a three-year study from the Road Jurisdiction Committee. Among the changes were recommending highways serving state parks and ferry terminals be added to the system. A major restructure was passed by the legislature in 1991 and took effect on April 1, 1992.

See also

• U.S. roads portal
• United States portal

Notes

1. The only ones listed in the 2006 log that do not provide such "missing movements" are SR 9 Spur to the truck customs in Sumas and SR 504 Spur and SR 906 Spur to WSDOT maintenance areas.
2. Only SR 501, SR 523, SR 531, and SR 548 run in a perpendicular direction.
3. For example, SR 4 from 1905 kept its number as PSH 4 until 1970.

References

1. ^ Staff. "RCW 47.17 State highway routes". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
2. ^ Staff (2006). State Highway Log (PDF) (Report). Washington State Department of Transportation. Archived from the original (PDF) on April 10, 2008. Retrieved May 26, 2012.
3. Staff (2006). Annual Mileage and Travel Information (Report). Washington State Department of Transportation. Retrieved May 26, 2012.
4. ^ Staff. "RCW 47.04.020 Classification of highways". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
5. Staff. "RCW 41.04.010 Definitions". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
6. Staff. "RCW 47.28.010 Latitude in selecting route". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
7. Staff. "RCW 47.01.260 Authority of department". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
8. Staff. "RCW 47.24.020 Jurisdiction, control". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
9. "WSDOT - Statewide Mountain Pass Map". www.wsdot.com.
10. Bureau of Transportation Statistics. Incoming Personal Vehicle Crossings, U.S.-Canadian Border, 1994-2003 (Report). U.S. Department of Transportation. Table 8c. there are two state highway crossings at Blaine, and the four non-state highway crossings are at Boundary (former State Route 251), Ferry, Nighthawk, and Point Roberts.
11. Washington State Legislature (1994). "An act relating to state highway routes; amending RCW 47.17.080, 47.17.081, 47.17.175, 47.17.305, 47.17.317, 47.17.556, 47.17.560, and 47.17.735; and adding new sections to chapter 47.17 RCW.". Session Laws of the State of Washington. Olympia, WA: State of Washington. 1994 chapter 209.
12. Staff (2006). "Washington Driver Guide" (PDF). Washington State Department of Licensing. p. 36. Retrieved May 26, 2012. Driving on ocean beaches—Driving is allowed on ocean beaches in Grays Harbor and Pacific counties. The beach is considered a state highway so all road, vehicle registration, and driver licensing regulations apply. The speed limit is 25 mph (40 km/h) and pedestrians have the right-of-way at all times. You may only enter the beach with your vehicle through marked beach approaches and you may only drive on hard-packed sand. Watch for beach closure signs and signs that occasionally prohibit beach driving.
13. Staff. "RCW 79A.05.010 Definitions". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
14. Staff. "RCW 79A.05.693 Ocean beaches in Seashore Conservation Area declared public highways". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
15. Staff. "RCW 79A.05.610 Jurisdiction over and administration of area". Revised Code of Washington. Washington State Legislature. Retrieved March 1, 2008.
16. "How does 1 = 405?". East Side Journal. January 30, 1964. p. 1.
17. "Washington State Highway System Legislative Statutes". Washington State Department of Transportation. 1979. Retrieved August 18, 2018 – via WSDOT Library Digital Collections.
18. Washington State Legislature (1905). "An act providing for the survey establishment and repair of certain State highways, and making an appropriation therefor.". Session Laws of the State of Washington. Olympia, WA: State of Washington. 1905 chapter 7, p. 18.
19. Washington State Legislature (1909). "An act providing for the survey of certain proposed state roads, and state road extensions, by the State Highway Commissioner, and a report on the feasibility of the same.". Session Laws of the State of Washington. Olympia, WA: State of Washington. 1909 chapter 51, p. 94.
20. Road Map of Washington Showing Main Traveled Roads (Map). State Highway Board. 1912. Retrieved May 26, 2012.
21. Washington State Legislature (1913). "An act relating to public highways, classifying the same and naming and fixing the routes of certain state roads.". Session Laws of the State of Washington. Olympia, WA: State of Washington. 1913 chapter 65, p. 221.
22. Staff. "Forty Years with the Washington Department of Highways" (PDF). Washington Department of Transportation. pp. 1–2, 6. Archived from the original (PDF) on October 30, 2008. Retrieved March 1, 2008.
23. Washington State Legislature (1923). "An act relating to, classifying, naming and fixing the routes of certain state highways, amending Section 6796, and repealing Sections 6791, 6792, 6793, 6794, 6795, 6797, 6798, 6799, 6800, 6801, 6802, 6803, 6804, 6805, 6806, 6808, 6809, 6811, 6812, 6813 and 6816 of Remington's Compiled Statutes.". Session Laws of the State of Washington. Olympia, WA: State of Washington. 1923 chapter 185, p. 627.
24. Washington State Legislature (1937). "An act relating to public highways, creating and establishing, describing and designating the primary state highways of the State of Washington and declaring an emergency.". Session Laws of the State of Washington. Olympia, WA: State of Washington. 1937 chapter 190, p. 933.
25. Washington State Legislature (1937). "An act relating to public highways; classifying public highways outside incorporated cities and towns; establishing, designating and describing secondary state highways as branches of primary state highways of this state; defining the powers and duties of certain public officers with respect thereto; providing for application of laws, rules and regulation of vehicles thereon; repealing acts and parts of acts in conflict; providing for constitutionality; and declaring an emergency.". Session Laws of the State of Washington. Olympia, WA: State of Washington. 1937 chapter 207, p. 993.
26. Staff (December 1, 1965). Identification of State Highways (PDF) (Report). Washington State Highway Commission. Part 1. Retrieved May 26, 2012.
27. Staff (December 1, 1965). Identification of State Highways (PDF) (Report). Washington State Highway Commission. Part 2. Retrieved May 26, 2012.
28. "Chapter 233: State Highway Designation Criteria" (PDF). Session Laws of Washington, 1990. Washington State Legislature. March 28, 1990. pp. 1277–1279. Retrieved October 10, 2021.
29. McDonald, Julie (January 4, 1992). "State will do some street swapping". The Daily News. p. A3. Retrieved October 10, 2021 – via Newspapers.com.

External links

• Washington State Department of Transportation
• Highways of Washington State
• State Highway Routes, Chapter 47.17 RCW

• State highways in Washington (state)