POSS London Underground

Following a successful pilot project at the Loughton and Waterloo tube stations, Strukton’s Railway Condition Monitoring system POSS® is being rolled out elsewhere on the London underground.

London Underground


The roll-out at London Underground is the result of close collaboration between Strukton and Siemens UK (formerly Invensys Rail and Westinghouse Rail Systems). The former Westinghouse had developed a new point mechanism, the ‘Surelock’, and wanted to be able to offer it to London Underground in combination with a monitoring system. After a positive trial with a POSS test point at the factory in Chippenham, Strukton and Siemens UK signed a partnership contract in 2010. The collaborative work between London Underground, Siemens and Stukton has resulted in the prevention of point machine failures through effective POSS alarms messaging and corrective action recommendations.

Project details

  • Installation of 93 points with the preventive maintenance and malfunction diagnosis system POSS
  • Designing the system and web application, and making them operational
  • Installing, connecting and configuring the systems
  • Integrating them into the current POSS online website (www.possonline.nl)
  • Maintenance period of one year

London Underground

London Underground’s first line was opened in 1863. Since then, London’s tube network has grown into a veritable underground city. About three million people a day use the underground, travelling through its long tunnels at great depths. The network consists of 408 kilometres of track in total, with 11 lines passing through 270 tube stations.

Installation at following tube stations

  • Loughton (extension of pilot)
  • Epping
  • Woodford
  • Newbury Park
  • Leytonstone
  • Acton Town
  • Ealing Common
  • North Acton
  • Northolt
  • Ruislip
  • West Ruislip
  • Harrow-on-the-Hill
  • Rickmansworth
  • Neasden

What is POSS?

Strukton's Railway Condition Monitoring System POSS is an important asset management tool and can be used for monitoring points, train detection systems, point heating, and civil engineering objects and other assets. It is the world's largest point monitoring system. The monitoring data are presented in a uniform manner and can be accessed via the internet.

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