Map of Pierce County in western Washington with SR 512 in red.
Route information
Maintained by WSDOT
Length
12.06 mi[1] (19.41 km)
Existed
1964–present
Major junctions
West end
I-5 in Lakewood
Major intersections
SR 7 in Parkland
SR 161 in Puyallup
East end
SR 161 / SR 167 in Puyallup
Location
Country
United States
State
Washington
County
Pierce
Highway system
State highways in Washington
Interstate
US
State
Scenic
Pre-1964
1964 renumbering
Former
← SR 510
→ SR 513
State Route 512 (SR 512) is a suburban state-maintained freeway in Pierce County, Washington, United States. It travels 12 miles (19 km) from west to east, connecting Interstate 5 (I-5) in Lakewood to SR 7 in Parkland and SR 167 in Puyallup. The freeway travels north–south through Puyallup, concurrent with SR 161.
The freeway follows the route of several county roads that were incorporated into Secondary State Highway 5G (SSH 5G) in 1937. The highway was renumbered to SR 512 in 1964 and gradually replaced by a freeway that was constructed between 1959 and 1973. The Puyallup section was initially built as a two-lane expressway until further funding was allocated by the state government to complete it as a four-lane freeway in 1976.
Further projects widened sections of SR 512 and added new interchanges to address increased demand caused by urban development along the freeway. Recent proposals have included interchange upgrades and the addition of high-occupancy vehicle lanes (HOV lanes).
^Multimodal Planning Division (January 3, 2018). State Highway Log Planning Report 2017, SR 2 to SR 971 (PDF) (Report). Washington State Department of Transportation. pp. 1498–1502. Retrieved November 28, 2018.
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Global Information
I-5 in Lakewood
SR 161 / SR 167 in Puyallup
