Skip to main content

Northwest Transit Systems Partners JV to oversee Sound Transit light rail expansion

Northwest Transit Systems Partners (NTSP), a joint venture consisting of US transportation design and construction management firm STV, and Mott MacDonald, is to oversee the systems construction of two new light rail extensions for Sound Transit’s light rail system in Seattle, US. The NTSP team will perform systems construction management services for the US$3.7 billion East Link Extension, a 14-mile-long extension connecting Seattle, Mercer Island, Bellevue and Redmond; and the US$1.9 billion 4.3-mile
August 23, 2017 Read time: 2 mins
Northwest Transit Systems Partners (NTSP), a joint venture consisting of US transportation design and construction management firm STV, and 1869 Mott MacDonald, is to oversee the systems construction of two new light rail extensions for Sound Transit’s light rail system in Seattle, US.


The NTSP team will perform systems construction management services for the US$3.7 billion East Link Extension, a 14-mile-long extension connecting Seattle, Mercer Island, Bellevue and Redmond; and the US$1.9 billion 4.3-mile Northgate Link Extension between the University of Washington at Husky Stadium, the University District and the Northgate area. Both extensions are key components of a larger system expansion being undertaken by Sound Transit over the next 25 years.

Sound Transit estimates that at least 50,000 people a day will use East Link by 2030. Once completed, the extension will be the world’s only passenger light rail service operating over a floating bridge, the section of I-90 over Lake Washington connecting Mercer Island and Seattle.

Related Content

  • July 4, 2012
    Meeting the challenges of smartcard fare payment
    David Crawford monitors a growing trend in contactless smartcard ticketing The north east United States has become a hive of activity in the smart fare payment arena. In October 2011, the New York Metropolitan Transportation Authority (MTA) published, as a preliminary to an imminent procurement process, the detailed concept of its New Fare Payment System (NFPS). Based on open payment industry standards, this is designed to be implemented on all MTA bus and subway services operated by New York City Transit (
  • February 23, 2024
    Detroit bridge to 'enhance community connectivity and mobility'
    Gordie Howe International Bridge will link trail systems between Canada and the US
  • August 31, 2021
    Microgrids & the new power generation
    Public transportation agencies are turning to microgrids to provide critical resilience in the event of local and regional power interruptions. Gordon Feller looks at projects in Maryland, New Jersey and Massachusetts
  • June 1, 2016
    B&C Transit modernises Miami-Dade Metrorail’s control systems
    Jason Gomez and Daniel Mondesir describe how passenger disruption was minimised during a major upgrading of the control room of Miami-Dade’s Metrorail. In 1984 when the Miami-Dade Department of Transportation and Public Works’ (DTPW) Metrorail system was launched in southern Florida, trains ran 18km along a single line and stopped at 10 stations.