Washington State Route 900

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State Route 900 marker

State Route 900

Map of King County in western Washington with SR 900 highlighted in red
Route information
Auxiliary route of I-90
Maintained by WSDOT
Length16.20 mi[1] (26.07 km)
Existed1964[2]–present
Major junctions
West end I-5 in Tukwila
Major intersections SR 167 in Renton
I-405 / SR 169 in Renton
East end I-90 in Issaquah
Location
CountryUnited States
StateWashington
CountyKing
Highway system
← SR 823→ SR 902

State Route 900 (SR 900) is a state highway serving part of King County, Washington, United States. It travels 16 miles (26 km) between southern Seattle and the Eastside suburbs of Renton and Issaquah, separated by the Issaquah Alps. The highway terminates to the west at an interchange with Interstate 5 (I-5) in Tukwila and to the east at I-90 in Issaquah, and also has intermediate junctions with I-405 and SR 167 in Renton.

SR 900 was created in the

Primary State Highway 2 that was replaced by SR 900. The highway originally terminated at an interchange with I-90 in Seattle's Rainier Valley
, but was truncated in 1991.

Route description

SR 900 begins as an extension of

Black River and a BNSF branch railroad,[6] to an intersection with SR 167 at Rainier Avenue.[7][8]

The highway splits into a

transit center,[9] before returning to two-way traffic at a bridge over the Cedar River, downstream of the Renton branch of the King County Library System.[10][11] SR 900 then continues east, around the northwest side of Liberty Park, before turning north to briefly parallel I-405 after its interchange with SR 169.[12] The highway then joins I-405 in a short concurrency for 0.90 miles (1.45 km),[1][13][14] traveling east through Renton's suburbs towards the East Renton Highlands. The highway transitions into a two-lane country road, entering unincorporated King County while following Tibbetts Creek northeastward between Cougar and Squak mountains, part of the Issaquah Alps highlands. SR 900 enters Issaquah as the four-lane 17th Avenue, passing the Issaquah park and ride,[15] before ending at a partial cloverleaf interchange with I-90 south of Lake Sammamish State Park.[7][8][16]

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 annual average daily traffic (AADT), which is a measure of traffic volume for any average day of the year. In 2014, WSDOT calculated that the busiest section of SR 900 was at its bridge over the Cedar River in downtown Renton, carrying 48,000 vehicles, while the least busiest section was on the eastbound lanes of the one-way pair in Renton, carrying 6,300 vehicles.[17]

History

The road now designated SR 900 was originally added to the state highway system in 1909, as an extension of the Snoqualmie Pass Road (State Road 7) which was completed for through traffic across the pass in 1915. At the time the highway was the main thoroughfare between Seattle and Spokane, with a route then around the south end of Lake Washington.[citation needed] In 1913 the highway was renamed the Sunset Highway,[18] which is still an informal moniker today.

The road became State Road 2 in 1923 and

US 10.[19]
The legislature in 1931 also designated the route as part of the Washington Loop Highway.

The opening of

Renton). In 1955,[citation needed
] Alternate US 10 was dropped, and it became SR 900 in 1964.

After April 1, 1992, the stretch of SR 900 between I-90 exit 3 at Rainier Avenue and along Martin Luther King Jr. Way to the Boeing Access Road was dropped from the officially designated highway. The west end of SR 900 is now milepost 5.93 due to this truncation; the east end is milepost 21.64.

WSDOT plans to construct a roundabout on SR 900 at South 129th Street in Skyway to address a high number of collisions; from 2012 to 2022, 931 collisions had been recorded on the highway between I-5 and Renton, with four fatalities.[20]

Major intersections

The entire highway is in King County.

Locationmi[1]kmDestinationsNotes
Martin Luther King Jr. Way South
.
0.550.89
 I-5 south – Portland		Interchange
Renton3.976.39

 SR 167 south to I-405
4.567.34
 SR 515 south (Main Street)
5.108.21

 SR 169 south / I-405 to I-5 – Maple Valley, Enumclaw		Interchange
5.629.04
 I-405 south – Tacoma		Interchange; west end of I-405 concurrency; westbound exit and eastbound entrance.
6.5210.49
 I-405 north – Everett		Interchange; east end of I-405 concurrency
Seattle, Spokane
Interchange; continues as 17th Avenue Northwest
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

  1. ^ a b c Multimodal Planning Division (January 15, 2015). State Highway Log Planning Report 2014, SR 2 to SR 971 (PDF) (Report). Washington State Department of Transportation. pp. 1668–1678. Retrieved June 8, 2015.
  2. ^ "47.17.825: State route No. 900". Revised Code of Washington. Washington State Legislature. 1991 [1970]. Retrieved May 28, 2014.
  3. ^ Transportation Data & GIS Office (October 6, 2011). "SR 5 - Exit 158: Junction Boeing Access Road" (PDF). Washington State Department of Transportation. Retrieved June 8, 2015.
  4. ^ Transportation Data & GIS Office (February 29, 2012). "SR 5 - Exit 157: Junction SR 900/M L King Way" (PDF). Washington State Department of Transportation. Retrieved June 8, 2015.
  5. ^ "South Seattle Intermodal Facility". BNSF Railway. Retrieved June 8, 2015.
  6. ^ 2013 Washington State Rail System (PDF) (Map). Washington State Department of Transportation. February 2014. Retrieved June 8, 2015.
  7. ^ a b Google (June 9, 2015). "State Route 900" (Map). Google Maps. Google. Retrieved June 9, 2015.
  8. ^
    OCLC 5673231
    . Retrieved June 8, 2015.
  9. ^ "Renton Transit Center/Park-and-Ride". Sound Transit. Retrieved June 8, 2015.
  10. ^ Transportation Data & GIS Office (May 4, 2009). "SR 900: Junction SR 900 CO 2nd Street" (PDF). Washington State Department of Transportation. Retrieved June 8, 2015.
  11. ^ "Directions to Renton Library". King County Library System. Retrieved June 8, 2015.
  12. ^ Transportation Data & GIS Office (March 17, 2014). "SR 405 - Exit 4: Junction SR 169/SR 900" (PDF). Washington State Department of Transportation. Retrieved June 8, 2015.
  13. ^ Transportation Data & GIS Office (March 17, 2014). "SR 405 - Exit 4: Junction SR 900/Sunset Boulevard" (PDF). Washington State Department of Transportation. Retrieved June 8, 2015.
  14. ^ Transportation Data & GIS Office (April 2, 2008). "SR 405 - Exit 5: Junction SR 900/N Park Drive/Sunset Boulevard" (PDF). Washington State Department of Transportation. Retrieved June 8, 2015.
  15. ^ "Issaquah Transit Center". Sound Transit. Retrieved June 8, 2015.
  16. ^ Transportation Data & GIS Office (June 2, 2010). "SR 90 - Exit 15: Junction SR 900/Lake Sammamish State Park" (PDF). Washington State Department of Transportation. Retrieved June 8, 2015.
  17. ^ 2014 Annual Traffic Report (PDF) (Report). Washington State Department of Transportation. 2014. pp. 209–210. Retrieved June 8, 2015.
  18. ^ "FORTY YEARS WITH THE WASHINGTON DEPARTMENT OF HIGHWAYS" (PDF). Archived from the original (PDF) on 2012-07-04. Retrieved 2023-12-22.
  19. ^ "Historic Highway SR 900". Washington State Department of Transportation. Retrieved July 19, 2020.
  20. ^ Lindblom, Mike (June 30, 2023). "Just outside Seattle, residents endure a dangerous yet ordinary intersection". The Seattle Times. Retrieved August 3, 2023.

External links

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