Washington State Route 512
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Map of Pierce County in western Washington with SR 512 in red.
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| Route information | ||||
| Defined by RCW 47.17.690 | ||||
| Maintained by WSDOT | ||||
| Length: | 12.06 mi (19.41 km) | |||
| Existed: | 1964 – present | |||
| Major junctions | ||||
| West end: |
 I‑5 in Lakewood
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 SR 7 in Parkland SR 161 in Puyallup
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| East end: |
 SR 161 / SR 167 in Puyallup
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| Location | ||||
| Counties: | Pierce | |||
| Highway system | ||||
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State Route 512 (SR 512) is a 12.06-mile (19.41 km) long state-maintained freeway serving southern Pierce County in the U.S. state of Washington. The freeway begins at a partial cloverleaf interchange with Interstate 5 (I-5) in Lakewood and travels east past SR 7 in Parkland and a concurrency with SR 161 to a trumpet interchange with SR 167 and SR 161 in Puyallup.
SR 512 originally began as county roads until 1937, when it became Secondary State Highway 5G (SSH 5G) and ran from Primary State Highway 5 (PSH 5) in Puyallup west to PSH 1 south of Tacoma. In a 1964 state highway renumbering, SSH 5G became SR 512 and by 1972, the original 2-lane road was expanded to a four-lane divided freeway. Recent proposals to control growing traffic on the freeway have included interchange upgrades and high-occupancy vehicle lanes (HOV lanes).
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