Highway tunnel emergency system

The A14 highway links the Paris business district of La Défense with Orgeval. The highway is mainly underground and the total tunnel length is more than 13 km. Technical supplier SDEL was selected to provide the tunnels with an emergency system. There are eight tunnels in total, and at each tunnel entrance SDEL designed a message sign and road barrier system to stop the traffic in case of an emergency.

A central redundant fibre network built with Lynx switches provides a backbone for a number of Wolverine SHDSL sub-networks that control the message signs. The backbone network and the sub-networks all use the Westermo FRNT redundancy protocol. This design delivers a redundant system that provides high availability, reliability, and safety which were the major factors in the customers decision to use the Westermo Lynx and Wolverine.

 

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