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Communication Dans Un Congrès Année : 2012

Measuring Territorial Effects of High-Speed Trains on Metropolitan Areas.

Résumé

Questions about the links between investments in transport infrastructure and regional development is a longstanding topic for spatial planners, specifically economists. According to several transport and urbanism specialists , economic effects induced by transport infrastructures are not defined by a deterministic relationship. Moreover, the complexity of transport impacts on development leads Plassard , amongst others, to consider the significance of territorial (not only economic) effects. In this context, instead of producing economic predictions, this work proposes a measure of territorial effects of a new transport infrastructure in a forecasting approach. So, the aim of this research is to build a tool for decision support in planning and transport policy that can show the potential of transport networks to provide the structure of a regional or metropolitan area. This doesn’t mean to replace an economic analysis, but rather to provide further and complementary information to the decision-makers. For instance, french LGV (high-speed train lines) are obviously major tools for development at regional scale. In PACA (Provence-Alpes-Côte d’Azur) region, the project can be seen as a future backbone to economic and social relations between Aix-Marseille metropolitan area and Côte d’Azur conurbation (around Nice). Nonetheless, within these two City-regions , LGV can be used as another transport service, thereby support local (urban) relations. To assess this double role of LGV, transport service, understood as the set of speed, schedule and fineness (number of train stops) has to be modelled. Modelling approach is based on a transport-oriented GIS using scheduled graph to represent transport service as previously defined. The model uses scheduled accessibility and path capillarity to define territorial effects of a given transport service. Scheduled accessibility gives disaggregated spatiotemporal distance between two places whereas path capillarity represents the fineness of transport service, i.e. potential for small scale use of the transport service. The confrontation of these two indicators can give an idea of the tension between speed and territorial potential. Indeed, a fine metropolitan service will necessarily damage trip speed at regional scale. At the opposite, a looser transport service (removal of a train stop), involves a speed gain.
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Dates et versions

halshs-01196214 , version 1 (16-09-2015)

Identifiants

  • HAL Id : halshs-01196214 , version 1

Citer

Alexis Conesa. Measuring Territorial Effects of High-Speed Trains on Metropolitan Areas.: A Methodological Proposal Using Path Capillarity Indices. 32nd International Geographical Congress, Aug 2012, Cologne, Germany. ⟨halshs-01196214⟩

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