A limousine market share model for airport access

Air travelers who use private automobiles for airport access often complain about highway and curbside congestion and the inconvenience of leaving the vehicle at the airport for long periods of time. These problems can usually be eased by the increased use of high occupancy modes of transport such as rail, bus, or limousine. In this dissertation, the use of scheduled and shared-ride limousine is proposed as a compromise between other high occupancy modes and the private auto. The purpose of the project was to develop a model for determining modal split between the automobile and the limousine. Data from the 1984 Airport Access Survey conducted by the Port Author ity of New York and New Jersey were used to develop and calibrate a limousine market share model. The model was a modification of the auto/transit model used in the USDOTs Urban Transportation Planning System (UTPS). A trip interchange factor was determined from the access time/cumulative frequency distribution for various trip making categories. Survey data were used to determine travel impedances for each mode based on time and out of pocket costs. Results of the study indicate that (1) airport and zonal differences exist that are not properly addressed by the model and (2) that the model is not transferrable to other airports. It is reccomended that further research be done using the multinomial logit analysis technique.