To minimize the environmental impact and residential demolition, the Northern Taiwan Second Freeway is chosen to pass through south-eastern hillside of Taipei Metropolis. Due to the complexity of terrain in northern Taiwan, the hillside route creates a total of 23 tunnels in a 15-kilometer long area together with interchanges and bridges among them. This paper presents detailed descriptions on the planning and design of traffic monitoring and management for the Group Tunnel Area. It includes traffic safety and monitoring facilities to be installed in tunnels, traffic monitoring devices to be set up on roads and interchanges, optic fibre transmission system simultaneously constructed with the road, and a computerized Tunnel Control Center in conjunction with 10 tunnel machine houses to ensure traffic safety. In addition, an air pollution monitoring station will be built to continuously collect air quality data so as to give early warning to the road users. All this monitoring and management information gathering to the Tunnel Control Center will also be interconnected to the traffic Surveillance and Control Center of the Northern Taiwan Freeways to constitute an integrated traffic monitoring and management network.
Abstract