Faculty Profiles - YAMAMOTO Toshiyuki

Papers - YAMAMOTO Toshiyuki

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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

経路選択行動の習慣化と旅行時間の思いこみ認知についての実験研究

山田憲嗣，中山晶一朗，藤井聡，山本俊行，北村隆一

平成12年度土木学会関西支部年次学術講演会講演概要 page： IV-31 2000

An Analysis of Household Vehicle Holding Durations Considering Intended Holding Durations Reviewed

Toshiyuki Yamamoto and Ryuichi Kitamura

Transportation Research Vol. 34A ( 5 ) page： 339-351 2000

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

Household vehicle holding durations are examined in this study using panel data. Panel data enable the observation of changes in household vehicle holdings in discrete time periods. If the data set contains retrospective recall data which offer information on the types and the occurrence time points of the transactions since the last survey, direct observation of the transaction process along a continuous time axis is possible. Furthermore, if the data contain information on intentions for future transactions and actual outcomes of the intentions in later waves, the relationship between intended transactions and actual transactions can be observed. In this study, we develop models of actual vehicle holding durations and models of intended vehicle holding durations for the same set of vehicles. Comparing these two sets of models, the effects on household vehicle holding durations of changes in the household's plans for vehicle holding and unexpected events can be inferred. To represent unaccounted associations between intended vehicle holding durations and actual vehicle holding durations, vehicle specific error components are introduced into the duration models. A non-parametric approach is adopted in model estimation using mass points, which requires no assumption on the distribution of the error components.

Stochastic Frontier Models of Prism Vertices Reviewed

Ryuichi Kitamura, Toshiyuki Yamamoto, Keiko Kishizawa and Ram M. Pendyala

Transportation Research Record ( 1718 ) page： 18-26 2000

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

A methodology to estimate the location and size of space-time prisms that govern individuals' activity and travel is presented in this study. Because the vertices of a prism are unobservable, stochastic frontier models are formulated to locate prism vertices along the time axis using observable trip starting or ending times as the dependent variable, and commute characteristics, personal and household attributes and area characteristics as explanatory variables. Models are estimated successfully with coherent behavioral indications. A mean difference of 1.46 hours is found between the observed trip ending time and the expected location of the terminal vertex for workers' evening prisms. The estimation results aid in enhancing our understanding of prism constraints by identifying the determinants of prism vertex locations.

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.

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.

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.

An Analysis of Time Allocation to In-home and Out-of-home Discretionary Activities across Working Days and Non-working Days Reviewed

Toshiyuki Yamamoto and Ryuichi Kitamura

Transportation Vol. 26 ( 2 ) page： 211-230 1999

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

The behavior of time allocation to two types of discretionary activities is formulated as a doubly-censored Tobit model. The model is capable of incorporating cases where the entire amount of time available for discretionary activity is allocated to one type of activity and the other type of activity is not engaged at all. The model is applied to examine individuals' allocation of time to in-home and out-of-home discretionary activities on working days and non-working days, using a weekly time-use data set from the Netherlands. Workers' daily activity patterns vary significantly between working days and non-working days, while it can be expected that patterns of time allocation are correlated between working days and non-working days. A set of error components is introduced into the model to represent this correlation, adopting a mass point approach which requires no assumption about the distribution of the error components. The validity of the model is examined statistically.

A Development of Disaggregate Models of Household Vehicle Ownership for Earlier Stages of Motorization Reviewed

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

In Shanghai Institute of Traffic Engineering (ed.), A Better Urban Transportation for the New Century? '99 Shanghai International Symposium on Urban Transportation Proceedings page： 186-195 1999

A Competing Risks Duration Model of Household Vehicle Transactions That Accounts for the Effects of the Occurrences of Changes in Explanatory Variables Reviewed

Yamamoto, T. and R. Kitamura and S. Kimura

Preprint CD-ROM of the 78th Annual Meeting of the Transportation Research Board 1999

将来交通需要予測のため世帯属性生成システムの構築

西田悟史・山本俊行・藤井聡・北村隆一

土木計画学研究・講演集 Vol. 22 ( 2 ) page： 235-238 1999

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