Demand for bus services between Bangkok and other provinces

The purpose of the study is to study the factors affecting the behavior and the demand for using buses between Bangkok and other provinces. This study examines the four main factors affecting the number of passengers. The factors consist of i) personal factors, ii) social factors, iii) carrier transport factors and iv) the beginning and end points of the trip factors. To fulfill the purpose of the study, the Poisson approach was employed. The data used in this study is the primary data obtained from samples of passengers who travel by bus between Bangkok and other provinces. 400 samples in total were selected from the bus terminal in Bangkok. The result shows that the Poisson approach cannot be explained by using the specification test for over dispersion; yet the marginal effect after the negative binomial regression can estimate the result with significance at five percent. Generally, there are 13 variables that affect the number of passengers: education, role of the family, schedules, entertainment (movie), entertainment (game), picking up and dropping passenger outside the terminal, number of seats per bus, role of the travel agent, time spent on the bus, facade of the bus, snack on the bus, promotion of bus transport, and promotion of other modes of transports.