A real-time aid-to-decision system for the choice of strategies using information and guidance messages on variable message signs (VMS) in motorway networks is presented. This system makes use of a network traffic flow simulation model and an expert system. A mock-up has been designed and tested on real data on the North-East Paris regional motorway network. Results are presented and discussed.
On-line short term traffic forecasting (1 hour to 2 hours in advance) is a major concern for motorway traffic managers, especially in case of incidents during heavy traffic conditions. In such situations, models based on pure statistical methods are not well suited, and explanatory models (based on the knowledge of traffic laws) should be used. The paper describes the developments made during a several years research programme on the Autoroutes du Sud de la France motorway network, resulting in real-time application of an Origin Destination matrix forecasting model (MITHRA) linked with a flow simulation model (SIMRES). Results obtained from real operation tests during Summer '95 are presented and discussed. The potential of such tools for the provision of aid-to-decision to the traffic operator is addressed.
Over the next few years, the local authorities of the Greater Lyo conurbation have embarked on a plan to revolutionise public trans in France's second city as a means to reduce traffic congestion a pollution, and improve public transport provision. A key part of this plan is the tramway project. The tramway will run on public roads, but in order to give the maximum level of priority to tram they will be segregated from general traffic and will receive priority at signalised junctions. This has involved the use of a traffic simulation software package which enables the impact of t tram on general traffic to be evaluated, taking particular accoun other forms of public transport (ie buses). This paper describes methodological approach used to plan tramway/highway intersection with reference to the impact of the tram on the road infrastructu bus services, road traffic congestion, and new route strategies f road traffic, cyclists and pedestrians. (A) For the covering abstract see ITRD E107957.
In order to reduce traffic congestion and pollution, and to improve transport provision for all sections of society, the local authorities of the Greater Lyon conurbation have embarked on a plan to revolutionise public transport in France's second city over the next few years. A key part of this plan is a project to construct a 23 km LRT (light rapid transit) tramway network, the first 19 km of which is due to open in January 2001. Trams will run on public roads, but will be segregated from general traffic and will receive priority at signalised junctions. This paper describes the approach used by ISIS to plan the tramway/highway intersections, with reference to the impact of the tram on the road infrastructure, bus services and general traffic, and to draw up new route strategies for road traffic, cyclists and pedestrians. For the covering abstract see ITRD E114174.
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