Evaluation of the Economic and Social Effectiveness of Park-and-Ride Facilities
MARGAIL F, Ecole Nationale des Ponts et Chaussres and AUZANNET P, Rdgie Autonome des Transports Parisiens, France
Based on the acknowledgement of the existence of a strong link between the performance of modes of transport and the characteristics of the areas they pass through, a methodology has been developed to locate a geographic area where the total costs of trav
Based on the acknowledgement of the existence of a strong link between the performance of modes of transport and the characteristics of the areas they pass through, a methodology has been developed to locate a geographic area where the total costs of travelling by public and private transport would become equal, that is, a place where it could be desirable, in the interests of the whole community, to organise a shill from one mode to another. The model was applied to cars and the RER (r~seau express rfgional - regional express" train network) in the Paris area and placed the optimal location at 20 km from the centre of Paris (Margall and Auzannet, 1995).
This first step justifies the socio-economic evaluation of a park-and-f/de scheme. The path from recognising the existence of a "point" of no difference at the intersection of the curves of the total costs of the competing modes to recommending the development of a park-and-ride scheme in this area assumes a priori that the profitability of an investment in a parking scheme such as this has been established. It is advisable therefore to make sure that the investment envisaged meets a need and that the costs involved will be offset by the benefits to the whole community. A cost- benefit analysis is applicable in these circumstances. The methodology must however be consistent with that used previously to evaluate the total costs of travel.
And so, the method that we propose is based on the one already used by the companies operating in the Ile-de-France region and which is used to assess the profitability of network extension schemes. This method, formalised in guidelines was defined in the mid-1970's and is now the subject of a methodological overhaul (Auzannet, 1994; RATP, 1977). This revision however only concerns extensions or the creation of new lines and there is currently no officially recommended method for assessing the profitability of creating a park-and-fide scheme.
The procedure that we have devised to carry out an evaluation of the social and economic effectiveness of a development such as this assumes consideration of the following:
- the reference situation
- the investment
- the direct and indirect costs of using the transport modes
- benefits derived by economic agents
Association for European Transport