통행시간가치의 도시공간상 변화패턴 특정에 관한 연구

• 영문명: A Study of the Spatial Pattern of The Value of Travel Time Variation in An Urban Area
• 발행기관: 한국지역개발학회
• 저자명: 정성용(Jung SungYong)
• 간행물 정보: 『한국지역개발학회지』제6권 제2호, 1~18쪽, 전체 18쪽
• 주제분류: 사회과학 > 지역개발
• 파일형태: PDF
• 발행일자: 1994.12.30

영문 초록

This paper addresses the problem of constant-coefficient travel demand model for an urban travel demand estimation and introduces the specification method of spatially varying coefficient models into the context of the logit model. The potential heteroscedasticity problem in a spatial logit model using expansion method was overcomed by respecifing the structure of conditional indirect utility and validated by a series of structural tests. The empirical result from the spatial logit model suggest that the coefficient of travel time variables in travel demand models vary significantly over an urban space. The following patterns of spatial variability are observed from the empirical models. First, the coefficient of auto in-vehicle travel time variable is smaller for those who travel a longer distance than for those who travel a shorter distance, perhaps because the relative impact of traffic congestion is smaller for the long distance traveller. Second, a commuter with a high income values his or her bus travel time more than a low income commuter beacuse the rich considers that buses are inferior to autos. Based on the empirical result obtained from this study, I conclude with high confidence that spatially varying travel demand model as specified by the expansion method provide a significant improvement in explanatory power over to traditional model.