Monitoring of 93 points at London Underground

09 July 2014

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. Work started on 4 March 2014 on connecting 64 points to the POSS monitoring system. A further 29 points are scheduled for September 2014.


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.

Following various pilots, POSS was installed at Hainault tube station in 2013. London Underground sets very stringent requirements because of the very narrow tunnels at great depths and the large volume of passengers. The point mechanisms in combination with POSS monitoring have now been accepted for use in the London Underground network. Last March, work could begin on the installation of POSS.

POSS monitoring

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. Experts can track the situation online from anywhere they want and use the data for preventative maintenance.