Faculty Profiles - YAMAMOTO Toshiyuki

Papers - YAMAMOTO Toshiyuki

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An Analysis of Public Attitudes toward Transportation Policies for Public Involvement in Transportation Planning Reviewed

Toshiyuki Yamamoto, Ryusuke Ashiya, Satoshi Fujii and Ryuichi Kitamura

Traffic Science Vol. 30 ( 1 ) page： 40-49 2000

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

Public intentions and preferences should be reflected in transportation planning, because it is the public that receive benefits from and incur costs of transportation policies. It is thus desired that planners have a grasp of public attitudes toward each of the policies they implement. In this study, we develop a discrete-choice model of individuals' importance ratings of transportation policy measures using socio-demographic attributes and the transportation levels of service as its explanatory variables. We also analyze the differences in individuals' importance ratings between the case they value policies from their own perspectives and the case where they do so considering the entire community. The results reveal differences in individuals' importance ratings between the two positions, and suggest that the individuals' attitudes vary by area of residence and according to their socio-demographic attributes.

Micro-Simulation Based Travel Demand Forecasting System for Urban Transportation Planning Reviewed

Yuzo Iida, Michiyoshi Iwabe, Akira Kikuchi, Ryuichi Kitamura, Kuniaki Sasaki Yasuo Shiromizu, Dai Nakagawa, Masatoshi Hatoko, Satoshi Fujii, Takayuki Morikawa and Toshiyuki Yamamoto

Infrastructure Planning Review Vol. 17 page： 841-848 2000

Language：Japanese Publishing type：Research paper (scientific journal)

This study proposes a new urban-travel demand forecasting system based on a micro-simulation approach as an alternative method to four-step estimation methods. This system comprises; 1) PCATS which simulates an individual's daily activity-travel pattern, 2) DEBNetS which simulates vehicle trips on urban road network, 3) a household simulator which generates future household attributes, and 4) a system to evaluate inter-zonal travel times and costs by public transit based on public transport networks and time tables. The system was applied to replicate the travel demand in a 1990 travel survey data set. A comparison between the observed and the forecast indicated that the system is capable of producing reasonable forecasts.

A Household Attributes Generation System for Long-range Travel Demand Forecasting with Disaggregate Models Reviewed

Satoshi Nishida, Toshiyuki Yamamoto, Satoshi Fujii and Ryuichi Kitamura

Infrastructure Planning Review Vol. 17 page： 779-787 2000

Language：Japanese Publishing type：Research paper (scientific journal)

A generating system of future household's attributes is developed in this study. The system creates the weight for each sample case obtained from the disaggregate survey to match present multiple aggregate marginal distributions, and simulates the demographic changes in each sample household along the time dimension. The simulation results applied to Osaka City suggest that the distributions of the number of trips or vehicle-holdings differ from those obtained by a conventional weighting method, that the system predicts population and number of households for the year 1995 fairly well using the data from 1990, and that the distribution of the predicted 2020 populations by repeated simulations has a high kurtosis.

On the Effects of Competition for Household Vehicles on Household Members' Mode Choices Reviewed

Toshiyuki Yamamoto, Ryo Umeki and Ryuichi Kitamura

Infrastructure Planning Review Vol. 17 page： 583-588 2000

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

In a household with fewer vehicles than household members, the use of a household vehicle by one member decreases its availability for other members. A model of mode choices by household members is developed as a vehicle allocation model in this study while taking into account the exclusiveness in vehicle use. A two-level nested logit model is applied where the choice by the main driver of a household vehicle is placed at a higher level and the allocation of the vehicle to other members in a lower level. The scale parameter is structured to represent the heterogeneity across households. The results of empirical analysis suggest that some improvement of the model's goodness-of-fit is gained by considering the exclusiveness in vehicle use, and that the main drivers who are household heads or drive standard-size vehicles are less altruistic.

Accessibility and travel: What can accessibility tell about land use and travel?

Kitamura, R., T. Akiyama and T. Yamamoto

Proceedings of Land Use and Travel Behaviour, International Conference, Amsterdam, MuConsult, B.V., Amersfoort. 2000

An Analysis of the Effects of a Periodical Vehicle Inspection Program on Household Vehicle Ownership Reviewed

Yamamoto, T., Kitamura, R. and Fujii, H.

Preprint of the 9th Meeting of the International Association for Travel Behaviour Research, Gold Coast 2000

On the Formulation of Time-Space Prisms to Model Constraints on Personal Activity-Travel Engagement Reviewed

Pendyala, R. M, Yamamoto, T. and Kitamura, R.

Preprint of the 9th Meeting of the International Association for Travel Behaviour Research, Gold Coast 2000

Analysis of effects of attitude, perception and unobserved heterogeneity on vehicle ownership reference Reviewed

Wu, G., Yamamoto, T. and Kitamura, R.

Preprint of the 9th Meeting of the International Association for Travel Behaviour Research, Gold Coast 2000

Application of PCATS/DEBNetS to Regional Planning and Policy Analysis: Micro-Simulation Studies for the Cities of Osaka and Kyoto, Japan Reviewed

Kitamura, R., Fujii, S., Yamamoto, T. and Kikuchi, A.

Proceedings of Seminar F, European Transport Conference 2000, PTRC Education and Research Services Ltd., London page： 199-210 2000

Analysis of Time Allocation, Departure Time, and Route Choice Behavior under Congestion Pricing Reviewed

Yamamoto, T. Fujii, S., Kitamura, R. and Yoshida, H.

Preprint CD-ROM of the 79th Annual Meeting of the Transportation Research Board 2000

Changes in Spatial Organization and Travel in Two Major Metropolitan Areas of Japan, 1970 through 1990 Reviewed

Kitamura, R., T. Akiyama, T. Yamamoto and K. Ogawa

Preprint CD-ROM of the 79th Annual Meeting of the Transportation Research Board 2000

Accessibility and Auto Use in a Metropolis Reviewed

Kitamura, R., T. Golob, T. Yamamoto and G. Wu

Preprint CD-ROM of the 79th Annual Meeting of the Transportation Research Board 2000

Stochastic Frontier Models of Prism Vertices Reviewed

Kitamura, R., T. Yamamoto, K. Kishizawa and R. M. Pendyala

Preprint CD-ROM of the 79th Annual Meeting of the Transportation Research Board 2000

途上国における世帯の自動車保有予定と住宅購入予定の相互関係に関する分析

呉戈，山本俊行，北村隆一

土木計画学研究・講演集 Vol. 23 page： 451-454 2000

MCMC法を用いた巨大選択肢集合下での目的地選択行動の再現

菊地輝，山本俊行，芦川圭，北村隆一

土木計画学研究・講演集 Vol. 23 page： 267-270 2000

都市内高速道路の料金改定による行動変化の主観的予測と実際の変化と事後認知の分析

西中卓也，山本俊行，北村隆一

土木計画学研究・講演集 Vol. 23 page： 695-698 2000

マルコフ連鎖モンテカルロ法による活動パターン生成手法に関する研究

山本俊行，岸澤桂子，北村隆一

土木学会第55回年次学術講演会講演概要集第４部 page： 658-659 2000

Self-reinforcing motorization: can travel demand management take us out of the social trap? Reviewed

Ryuichi Kitamura, Shoichiro Nakayama and Toshiyuki Yamamoto

Transport Policy Vol. 6 ( 3 ) page： 135-145 1999

Language：English Publishing type：Research paper (scientific journal)

Motorization is a self-reinforcing process which involves positive feedback. Using a simple model of bi-modal transportation system, it is shown that a transportation system may eventually be dominated by the automobile, or may equilibrates at a grossly inefficient point due to social dilemmas associated with automobile use. Furthermore, in areas with well developed public transit, road capacity addition can be detrimental not only to the public transit but also to the automotive transportation. TDM measures are conceived in this study as mechanisms to prevent the divergence of the motorization process away from a social optimum due to its positive feedback and social dilemmas. A simple model of bi-modal transportation system and a cellular automata model of individuals' TDM compliance behavior are combined in the study to see how TDM measures that rely on individuals' voluntary cooperation may be effective. Results of simulation analyses based on the model are presented.

世帯内での自動車利用の競合を考慮した交通機関選択行動の分析

梅木亮・山本俊行・北村隆一

平成11年度土木学会関西支部年次学術講演会講演概要 page： IV-63 1999

A Study on the Fairness of Road-Pricing Reviewed

Sikyun Ryoo, Toshiyuki Yamamoto and Ryuichi Kitamura

Infrastructure Planning review Vol. 16 page： 707-715 1999

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Papers - YAMAMOTO Toshiyuki