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Tramlink looks at speed monitoring systems

Transport for London’s market engagement is for a system that is easily retrofitted to its mixed fleet of Bombardier CR4000 and Stadler Variobahn trams. (Image credit: Train Photos / CC BY-SA 2.0)

Transport for London is “seeking to conduct an early market engagement exercise in advance of a potential procurement process” for Automatic Vehicle Speed Monitoring Device equipment for Tramlink. It is intended to fit all trams in the UK capital’s fleet, “to ensure that vehicle speed complies with the speed restrictions defined for its current location and direction.”

TfL has published a ‘prior information notice’ in the Official Journal of the European Union that encompasses retro-fitment to 23 Bombardier CR4000 and 12 Stadler Variobahn vehicles, using proven technology with a useful life of 25 years. A driver vigilance application could be a stand-alone system or incorporated within or interfaced to the AVSM, including the option of applying the tram’s brakes if speed alert warnings draw no action from the driver.

Tramlink suffered a fatal derailment on 9 November last year, when tram 2551 turned on its side at Sandilands Junction on the approach to Sandilands stop; seven people were killed. Early investigations have indicated that the tram had been travelling faster than the 20km/h (approx. 12mph) speed limit.