Stockholm CTS
The Swedish National Roads Administration (SNRA) contracted Serco to design, develop and install the Central Technical System for the road network around the Stockholm region. The CTS provides overall co-ordination and management of new and existing roadside equipment and systems.
Surveillance, information and control via the CTS are important in the prevention of accidents as well as the initiation of immediate action once incidents have occurred.
Computer Management System
The CTS consists of a computer management system with operator workstations, a state of the art video wall, internal local networks and connection to external communications. The task of the CTS is to integrate information from connected subsystems and other systems into a uniform operator interface, assisting in decision making and controlling subsystems to execute those decisions.
Traffic surveillance is achieved through closed circuit television and incident detection from the existing motorway control system. Operators are also informed of any abnormalities in air quality and equipment failures. GSM installation in the tunnels make it possible to communicate via mobile telephones.
Traffic control
Traffic can be controlled via motorway signals over each carriageway to regulate traffic speeds and close off lanes if necessary. The signals are set automatically in response to prevailing traffic conditions although operators have the capability to manually intercept where applicable. The CTS incorporates the ability to control the timing and monitoring of traffic signals.
Electronic variable message signs
Information is disseminated to motorists via electronic variable message signs which are to be installed every 100-150 metres. Local radio stations and the Internet provide information regarding traffic flow and special events. Road users can receive information regarding the current status of the network by telephone.
Operations monitoring
The CTS also provides operations monitoring maintenance of all 13 connected subsystems including all control and security systems in the tunnels.
“In Stockholm, our integrated solution allows a smaller number of operators to better manage an increasingly complex traffic environment, including one of the world’s largest urban civil engineering projects – the recently opened Southern Link Tunnel”
Lars Jonsson, Swedish National Roads Administration
For more information visit Intelligent Transport Systems.
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