A Multicriteria Approach for the Analysis of the Northwest Busway Project in Campinas Metropolitan Region
P Bisca, J L Fuzaro Rodrigues, M L Galves, Universidade Estadual de Campinas, BR
This paper presents an application of Multiple Criteria Decision Analysis (MCDA) to the project of a busway in Campinas Metropolitan Region.
The Campinas Metropolitan Region is a conurbation of 29 municipalities in Southeast Brazil, with approximately 2,000,000 total population. Metropolitan authorities are considering the construction of a busway connecting the core city of Campinas to four municipalities to the Northwest.
This busway will substitute existing conventional bus routes along regular streets. It will be constructed basically using the right of way of existing avenues, with new construction where discontinuities exist between avenues. In the section closest to Campinas, it will use the right of way of State Highway 101, a four-lane divided facility. Trunk routes will run on the busway, and a system of feeder routes will be established.
This paper focuses on the 9-km section along State Highway 101, where four alternative concepts can be considered: (1) let buses share regular highway lanes with general traffic; (2) build additional bus-only lanes (one on each direction) next to the median; (3) build additional bus-only lanes to the right of existing lanes; and (4) not build the busway at all.
This decision involves multiple aspects, including roadway costs, vehicle operating costs, impedance to general traffic, safety, environmental and land use impacts.
It was considered that a multicriteria approach, known as multiple criteria decision analysis (MCDA), would be particularly appropriate for the problem at hand. The aim of MCDA is to help an individual or group think about and understand a decision situation. Using this approach, seventeen criteria were defined and then grouped in four general criteria as follows:
? Cost: roadway construction, roadway maintenance, bus operating costs, general traffic operating costs;
? Level of service: access time to busway, in-bus travel time, number of transfers, bus crowding, general traffic travel time;
? Safety: pedestrian accidents (bus users and non-users), non-pedestrian accidents;
? Environment: particle emissions along the corridor, overall gas emissions, noise levels, new business activities, urban-renewal aspects.
Value functions were defined for each of the seventeen criteria. Using these functions, numerical values were calculated for each alternative according to each criterion. In the following step, individual values were aggregated for each alternative according to each of the four general criteria. Finally, those were aggregated to produce a single value for each alternative by means of an additive model.
Alternative 2 ranked best, with a close third place to Alternative 3. The do-nothing alternative ranked worst, showing that the idea of the busway is correct (something that was not clear at first).
Association for European Transport