Setting things up
Jack Nelson

Sound Transit 4

Map is Public
created 15 weeks ago
updated 15 weeks ago
In November 2028, Seattle voters approved the $63billion Sound Transit 4 (ST4) ballot measure, allocating additional funds the not yet complete 4 line regional transit system into a 9 line system over the next 30 years, and eventually bringing light rail service to Fremont, Kirkland, Bothell, Woodinville, Renton, and Burien, and adding a new grade-separated segment along the Duwamish river between Seattle and SeaTac airport, bypassing the at-grade MLK segment. Despite the delays and cost overruns experienced during ST3 which pushed completion of the Ballard and Issaquah expansions past the planned 2042 completion date to 2047 and 2049 respectively, experience and lessons learned from ST3 resulted in better cost and timeline execution of the ST4 expansions. Summary of the ST4 Expansion Projects: * 1 Line Duwamish Branch - Broke Ground June 2040, completed October 2042. With the re-routing of the 1 Line, the 5 Line was created to continue serving the MLK corridor that the 1 Line previously ran. Average time from Westlake to SeaTac on the 1 Line was halved from 38 minutes to 17 minutes. * 4 Line Kirkland Expansion - Broke ground September 2048, completed May 2052. Before the 4 Line ST3 project was fully complete, work had already begun on the above-grade expansion North to Kirkland, adding a stop just south of Google's campus, and terminating at the new Kirkland Link Transit Center, which would eventually also be served by the cross-lake 8-line and become the Southern terminus of the 9 Line in the 2050s. * 3 Line Burien Expansion - Broke ground January 2030, completed June 2034.
Branch History
  1. MetroDreamin' by Jack Nelson
  2. Built from scratch

Comments

Score
0
Ridership
212M
Cost
$ 21.5B
Stations
179
Lines
14
Modes
4
Length
416 km
Where do these numbers come from?
Sound Transit 4 by
created at
updated at 2025-12-21T05:07:18.098Z
In November 2028, Seattle voters approved the $63billion Sound Transit 4 (ST4) ballot measure, allocating additional funds the not yet complete 4 line regional transit system into a 9 line system over the next 30 years, and eventually bringing light rail service to Fremont, Kirkland, Bothell, Woodinville, Renton, and Burien, and adding a new grade-separated segment along the Duwamish river between Seattle and SeaTac airport, bypassing the at-grade MLK segment. Despite the delays and cost overruns experienced during ST3 which pushed completion of the Ballard and Issaquah expansions past the planned 2042 completion date to 2047 and 2049 respectively, experience and lessons learned from ST3 resulted in better cost and timeline execution of the ST4 expansions. Summary of the ST4 Expansion Projects: * 1 Line Duwamish Branch - Broke Ground June 2040, completed October 2042. With the re-routing of the 1 Line, the 5 Line was created to continue serving the MLK corridor that the 1 Line previously ran. Average time from Westlake to SeaTac on the 1 Line was halved from 38 minutes to 17 minutes. * 4 Line Kirkland Expansion - Broke ground September 2048, completed May 2052. Before the 4 Line ST3 project was fully complete, work had already begun on the above-grade expansion North to Kirkland, adding a stop just south of Google's campus, and terminating at the new Kirkland Link Transit Center, which would eventually also be served by the cross-lake 8-line and become the Southern terminus of the 9 Line in the 2050s. * 3 Line Burien Expansion - Broke ground January 2030, completed June 2034.
Map type: local | Total track length: 258 miles | Center coordinate: 47.5626, -122.3067 | * 1 Line: (Light rail/interurban, 24 stations) Ballard, Interbay, Smith Cove, Seattle Center, South Lake Union, Denny, Westlake, Midtown, Intl District / Chinatown, Stadium, SODO, Georgetown, Boeing, E Marginal Way, Tukwila Intl Blvd, SeaTac, Angle Lake, Kent Des Moines, Star Lake, Federal Way, South Federal Way, Fife, Portland Ave, Tacoma Dome * 3 Line: (Light rail/interurban, 30 stations) Everett, Evergreen, Paine Field, Mariner, Ash Way, Alderwood, Lynwood, Montlake Terrace, Shoreline North, Shoreline, Pinehurst, Northgate, Greenwood, North 60th Street, Fremont, Queen Anne, South Lake Union, Denny, Westlake, Midtown, Intl District / Chinatown, Stadium, SODO, Delridge, Avalon, Alaska Junction, California Avenue Southwest, White Center, Burien, SeaTac * 5 Line: (Light rail/interurban, 15 stations) Denny, Westlake, Symphony, Pioneer Square, Intl District / Chinatown, Stadium, SODO, Beacon Hill, Mt Baker Link, Columbia City, 42nd Avenue South, Station Name, E Marginal Way, Tukwila Intl Blvd, SeaTac * 8 Line: (Light rail/interurban, 8 stations) Ballard, Fremont, Station Name, U District, University Village, Magnuson Park, Kirkland, Downtown Redmond * 2 Line: (Light rail/interurban, 32 stations) Woodinville Downtown, South Woodinville, Totem Lake, Downtown Redmond, Northeast 70th Street, 156th Avenue Northeast, 152nd Avenue Northeast, Station Name, 120th Avenue Northeast, Eastrail, Northeast 6th Street, East Main, 112th Avenue Southeast, Sunset Highway, Judkins Park, Intl District / Chinatown, Pioneer Square, Symphony, Westlake, Capitol Hill, Husky Stadium, U District, Roosevelt, Northgate, Pinehurst, Shoreline, Shoreline North, Montlake Terrace, Lynwood, Alderwood, Ash Way, Mariner * 6 Line: (Light rail/interurban, 5 stations) Husky Stadium, Madison Valley, Central District, Yesler Terrace, Intl District / Chinatown * 7 Line: (Light rail/interurban, 25 stations) Downtown Redmond, Northeast 70th Street, 156th Avenue Northeast, 152nd Avenue Northeast, Station Name, 120th Avenue Northeast, Eastrail, Northeast 6th Street, East Main, 112th Avenue Southeast, Station Name, May Creek, North Renton, Renton Downtown, Southcenter, Tukwila Intl Blvd, SeaTac, Angle Lake, Kent Des Moines, Star Lake, Federal Way, South Federal Way, Fife, Portland Ave, Tacoma Dome * Sounder: (Commuter/suburban rail, 11 stations) South Tacoma, Tacoma Dome, Puyallup, Sumner, Auburn, Kent, Tukwila, King Street Station, Edmonds, Mukilteo, Everett * RapidRide G: (Bus rapid transit, 16 stations) East Blaine Street, 38th Avenue East, East Madison Street, Station Name, Station Name, East Madison Street, Madison and 12th Ave, Madison and Boylston Ave, Spring Street, Station Name, 4th Avenue, 1st and Madison, 3rd Avenue, University Street, Seneca Street, Spring Street * T Line: (Tram, 18 stations) Tacoma Dome, Pacific Avenue, Pacific Avenue, Station Name, South 12th Street, Commerce Street, Broadway, Court F Street, Division Avenue, South 7th Street, Station Name, South 18th Street, South Ainsworth Avenue, South 19th Street, Station Name, Station Name, South 19th Street, 64th Avenue West * Seattle Streetcar: (Tram, 30 stations) Harvard Avenue East, East Miller Street, East Galer Street, Aloha St, Broadway and Reupublican, Broadway and Denny, Broadway and Pike-Pine, Broadway and Marion, Broadway and Terrace, East Yesler Way, Station Name, South Jackson Street, 7th Avenue South, Station Name, South Jackson Street, Pioneer Square, 1st and Madison, 1st and Pike, Westlake Streetcar, 7th Avenue, Denny, Westlake Avenue North, Station Name, Lake Union Park, Station Name, Eastlake Avenue East, Eastlake Avenue East, Eastlake and Boston, Yale Avenue East, Hamlin * 4 Line: (Light rail/interurban, 12 stations) Central Issaquah, Issaquah North, Lakemont, Southeast 37th Street, Station Name, 112th Avenue Southeast, East Main, Northeast 6th Street, Eastrail, South Kirkland, Northeast 68th Street, Kirkland * RapidRide R: (Bus rapid transit, 20 stations) 7th Avenue South, South Jackson Street, Dearborn Place South, Rainier Avenue South, Rainier Avenue South, Mount Baker Transit Center, Wetmore Avenue South, Rainier Avenue South, Rainier Avenue South, Rainier Avenue South, Rainier Avenue South, Rainier Avenue South, Station Name, Rainier Avenue South, Station Name, South Garden Street, South Medley Court, Rainier Avenue South, Rainier Avenue South, Yukon Avenue South * 9 Line: (Light rail/interurban, 5 stations) Bothell, Woodinville Downtown, South Woodinville, Totem Lake, Kirkland
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