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SEA Underground

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Satellite Transit System
Overview
OwnerPort of Seattle
LocaleSeattle-Tacoma International Airport serving Seattle & Tacoma
Termini
  • Main Terminal South Station
  • Main Terminal North Station
Stations6
Service
TypePeople mover
Services3
Operator(s)Port of Seattle
Rolling stock21 Bombardier Innovia APM 100 vehicles
History
Opened1969
Technical
Line length1.7 miles (2.7 km)
CharacterServes sterile parts of the airport
Highest elevationUnderground

The Satellite Transit System (STS) is an automated people mover (APM) system operating in the Seattle-Tacoma International Airport. Originally opening in 1969, the STS system is the second oldest airport people mover system in the United States.[1] The APM was designed to quickly transport passengers between SeaTac Airport's Main Terminal and the North and South Satellites.

History

The system opened in 1969 at a total cost of $14 million. The original system consisted of nine vehicles; an additional three were added in the mid-1970s. The system was designed to have a capacity of 14,400 passengers per hour and travel at a maximum speed of 27 miles per hour (43 km/h).[2]

The original STS vehicles were built by Westinghouse and had a maximum capacity of 102 passengers.[3] The average travel time for the two loops was 3.3 minutes, and 1.8 minutes on the shuttle, and each vehicle was estimated to amass 47,000 miles (76,000 km) annually.[3]

In 1999, the Port of Seattle authorized $142 million to completely overhaul the entire STS system.[4] The overhaul included all aspects of the system including trains, controls, power supplies, stations, emergency ventilation systems and maintenance shops.[4] The upgrade and modernization was completed in 2003.[5] The 21, Bombardier Innovia APM 100 vehicles use CITYFLO 650 signaling technology and a radio Communication Based Train Control (CBTC) system for its automated operation.[5]

Layout and operation

Legend
North Satellite (N gates)
Concourse C (C gates)
Main Terminal North (D gates)
 SeaTac/Airport station Link light rail
Main Terminal South (A gates)
Concourse B (B gates)
South Satellite (S gates)
Handicapped/disabled access all stations accessible
This diagram:

The STS is located within secure areas of the airport. The system consists of six stations serving each of the four gate concourses extending from the main terminal (Concourses A, B, C and D), and the North and South Satellite terminals. Each station is equipped with platform edge doors. The system consists of two loops serving the satellite terminals and a third line connecting the two loops in the main terminal.[3][6]

  • The North Train Loop is 4,100 feet (1,200 m)[3] in length and has stations in the D Concourse, the C Concourse and the N Concourse.[6]
  • The South Train Loop is 3,700 feet (1,100 m)[3] in length and has stations in the A Concourse, the B Concourse and the S Concourse.[6]
  • The Shuttle Train is 1,000 feet (300 m)[3] in length and has stations in the A Concourse and D Concourse, and serves as a connection between the North and South Train Loops.[6]

Public art

As part of its 2003 renovation, public art projects were included in the scope of the project. The Main terminal's south station features a series of 56-plus flowers cast of aluminum and aluminum/resin mix created by Nancy Blum.[7] In the Main Terminal's north station is a series of nine paintings created by Karen Ganz representing various travelers.[8]

References

  1. ^ "Satellite Transit System Really Moving". McGraw-Hill Northwest Construction. November 2003. Retrieved 2008-02-13. {{cite news}}: Cite has empty unknown parameter: |coauthors= (help)
  2. ^ Office of Technology Assessment (June 1975). "The Status and Potential of Automated Guideway Transit in Urban Areas" (PDF). Automated Guideway Transit: An Assessment of PRT and Other New Systems. Retrieved 2008-02-13. {{cite news}}: Cite has empty unknown parameter: |coauthors= (help)
  3. ^ a b c d e f Office of Technology Assessment (June 1975). "Who Ownes AGT Systems?". Automated Guideway Transit: An Assessment of PRT and Other New Systems. Retrieved 2008-02-13. {{cite news}}: Cite has empty unknown parameter: |coauthors= (help)
  4. ^ a b "Trains at airport to be replaced". The Seattle Times. November 11, 1999. {{cite news}}: |access-date= requires |url= (help); Cite has empty unknown parameter: |coauthors= (help)
  5. ^ a b "Sea-Tac Satellite Transit: Complex system delivered under schedule, budget" (PDF). Centerlines. Spring 2005. Retrieved 2008-02-13. {{cite news}}: Cite has empty unknown parameter: |coauthors= (help) [dead link‍]
  6. ^ a b c d Port of Seattle. "Port of Seattle: Train System Map". Retrieved 2008-02-04.
  7. ^ Port of Seattle. "Satellite Transit System: Nancy Blum". Retrieved 2008-02-04.
  8. ^ Port of Seattle. "Satellite Transit System: Karen Ganz". Retrieved 2008-02-04.
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