State Route 509 South

SR 509 continues the SR 99 freeway south from East Marginal Way and the 1st Avenue South Bridge from the Duwamish River to Burien. Departing the freeway soon after SR 509 begins is the Myers Way off-ramp to Olson Place SW and White Center.

08/29/06

SR 509 exits the city of Seattle and continues to a half diamond interchange with South 112th Street. South 112th Street stems east from 5th and 6th Avenues South to become Glendale Way South at 14th Avenue South.

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Southbound at the South 112th Street off-ramp to Beverly Park and Southern Heights on SR 509.

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South 128th Street crosses paths with SR 509 at a diamond interchange in Boulevard Park.

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South 128th Street straddles the northern city limits of Burien east to Riverton.

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Reassurance marker posted near the South 136th Street overpass on SR 509 south.

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SR 518 provides a freeway connection east to Seattle-Tacoma International Airport and Interstate 5 at Tukwila. The east-west route stretches 3.42 miles from its beginning at SR 509 to the Interstates 5 & 405 interchange.

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The South 146th Street off-ramp departs SR 509 south next in one half mile. South 146th Street joins the freeway with the Highline neighborhood of Burien.

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A distributor roadway serves both the South 146th Street half diamond interchange and the parclo interchange with SR 518. SR 518 ends as SW 148th Street near the Burien city center.

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Drivers bound for South 146th Street and the adjacent 1st Avenue South (old SR 509) commercial strip depart SR 509 south in this scene.

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The connection to SR 518 east requires a left turn at a signalized intersection. SR 518 immediately upgrades into a full freeway east to Sea-Tac and Tukwila.

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SR 509 continues south one half mile to a parclo interchange with South 160th Street at Five Corners.

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A SR 509 reassurance marker follows between the South 152nd and 156th Street overpasses. 1st Avenue South continues to parallel the freeway closely as a commercial arterial to the west.

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Drivers bound for South 160th Street part ways with the SR 509 freeway. 160th Street ends at Des Moines Memorial Drive to the east and continues west to Sunnydale and Gregory Heights.

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Entering the city of SeaTac along SR 509 south at Des Moines Memorial Drive.

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Passing over South 168th Street, 0.75 miles north of the SR 509 freeway end and transition onto Des Moines Memorial Drive north at South 188th Street in Des Moines.

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Currently the SR 509 freeway ends at S 188th Street west of Seattle-Tacoma International Airport (SEA).

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A construction vehicle exit to the South 176th Street overpass provided access to the runway project of Seattle-Tacoma International Airport nearby.

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Presently SR 509 south joins Des Moines Memorial Drive north via a trumpet interchange with South 188th Street in Des Moines. SR 509 follows a surface route northwest via Ambaum Boulevard and South 174th Street to 1st Avenue South and the Normandy Park city line.

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Alexander Avenue northbound at the split intersection with SR 509 (North / South Frontage Road).

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SR 509 upgrades into a freeway west from Alexander Avenue. North Frontage Road splits to the right and provides access to Port of Tacoma Road.

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Port of Tacoma Road leads northwest to East 11th Street (former SR 509) and south to Exit 136 of Interstate 5 and 20th Street East at Fife.

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A grassy median alludes to a potential eastward extension of the SR 509 freeway. The freeway begins at the frontage road split, but not before an at-grade railroad crossing.

08/29/06

The frontage road system of SR 509 includes a parclo interchange with Port of Tacoma Road outside the freeway mainline.

08/29/06

Southbound shield assembly posted at the North Frontage Road on-ramp between Port of Tacoma Road and Milwaukee Way.

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SR 509 ends in 1.75 miles at the single point urban interchange with Interstate 705 near downtown Tacoma.

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Spanning the Puyallup River and looking north from SR 509 at the Lincoln Avenue truss bridge.

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A half diamond interchange adds traffic from Portland Avenue onto SR 509 west, one mile out from Interstate 705. Interstate 705 provides connections south to Interstate 5 and SR 7 and north to Schuster Parkway and Ruston Way.

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Northwesterly view of the Tacoma skyline and the East 11th Street draw bridge over Thea Foss Waterway. East 11th Street represents the original alignment of SR 509.

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SR 509 travels a four lane causeway between Portland Avenue and the cable-stayed bridge over Thea Foss Waterway.

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Interstate 705, the Tacoma Spur, travels 1.44 miles overall from Interstate 5 & SR 7 (Exit 133) nearby to Schuster Parkway and Stadium Way north of downtown.

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SR 509 enters the SPUI with Interstate 705 and ends as South 21st Street. SR 7 begins at Interstates 5 & 705 and ventures south 58.26 miles to U.S. 12 at Morton. Connections with Ruston Way to the north lead drivers to the Town of Ruston.

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Ramps to Interstate 705 immediately follow the bridge over Thea Foss Waterway.

08/29/06

SR 509's cable stayed bridge, opened in 1996, replaced the East 11th Street draw bridge as the main route between the City Center and Port of Tacoma.¹

08/29/06