published journal article
Organization Theory and the Structure and Performance of Transit Agencies. Abridgment
Transportation Research Record
Publication Date
January 1, 1980
Archives: Research Products
Phd Dissertation
An activity-based trip generation model
Publication Date
March 1, 1997
Associated Project
Author(s)
Areas of Expertise
Suggested Citation
Ruey-min Wang (1997) An activity-based trip generation model. PhD Dissertation. UC Irvine. Available at: https://escholarship.org/uc/item/6f79m1sk.Related Publications
working paper |
Oct 1993
Ameliorating Congestion by Income Redistribution
working paper |
Jan 1997
Economics and Urban Transportation Policy in the United States
book/book chapter |
Oct 1998
Project Evaluation
working paper |
Sep 1995
On the Costs of Air Pollution from Motor Vehicles
working paper |
Sep 1994
Population and Employment Densities: Structure and Change
Phd Dissertation
Econometric Models in Transportation
Publication Date
June 15, 2015
Author(s)
Areas of Expertise
Abstract
The three chapters in this dissertation study and apply econometric models to answer questions in transportation economics. Chapter 1 and 2 analyze the Berry, Levinsohn and Pakes (BLP) discrete choice model for combined micro- and macro-level data. Chapter 1 considers the concerns of choice set aggregation and estimating consistent standard errors within the BLP Model. These concerns are studied within the context of a vehicle choice application with interest in estimating household valuation of fuel efficiency. Chapter 2 studies the numerical properties of the maximum likelihood approach to estimating this BLP model. Chapter 3 applies a Poisson-Log Normal panel data model to study the effect of red light cameras on collision counts in Los Angeles. The camera program suffered from weaknesses in enforcement that dampened the effectiveness of the program over time. The model considered here controls for this dampening effect. Chapter 1 finds that choice set aggregation affects the point estimates obtained from the BLP model and causes standard errors to be too small. The use of inconsistent sequential standard errors also underestimates the magnitude of standard errors. These findings may partly explain the disparity across existing estimates from choice models on the value households place on vehicle fuel efficiency. Chapter 2 finds that the maximum likelihood estimation approach is able to find the global minimum regardless of choice of starting values, optimization routine used and tightness of convergence criteria. These findings highlight the benefits of estimating the BLP model on combined micro- and macro-level datasets using the maximum likelihood approach compared to using the nested fixed point approach and only macro level data where numerical stability is difficult to obtain. Chapter 3 finds that controlling for the dampening effect from poor enforcement, the Los Angeles Automated Red Light Camera program decreased red light running related collisions but increased right-angle and injury collisions, as well as collisions overall.
Suggested Citation
Timothy Wong (2015) Econometric Models in Transportation. PhD Dissertation. UC Irvine. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/17uq3m8/alma991017775139704701. working paper
Extraboard Scheduling, Workers' Compensation and Operator Stress in Public Transit: Research Results and Managerial Implications
Publication Date
March 1, 1984
Author(s)
Working Paper
UCI-ITS-WP-84-4
Areas of Expertise
Abstract
This paper reports the results of a year-long study of practices associated with employee absence in the transit industry. The research focused on three areas: extraboard scheduling, workers’ compensation, and occupational stress. An extensive review of prior research was conducted, and new data about both organizational policies and employee attitudes within California transit agencies were collected by mail surveys and analyzed statistically. Twenty-one organizations and 1039 operating employees from within California responded to the surveys. The research found that most organizations use judgmental methods for determining the size of the extraboard and that these methods are likely to result in extraboards that are either too large or too small. Strong relationships were identified between workers’ compensation experience and equipment design and maintenance practices. Occupational stressors were strongly correlated with self-reported health outcomes and job attitudes. Suggestions are offered for managerial actions that would mitigate some of the problems identified by the research.
Suggested Citation
Lyn Long and James L. Perry (1984) Extraboard Scheduling, Workers' Compensation and Operator Stress in Public Transit: Research Results and Managerial Implications. Working Paper UCI-ITS-WP-84-4. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/5xc726kn. published journal article
Closure to “ digital imaging concepts and applications in pavement management ” by Stephen G. Ritchie (May/June, 1990, vol. 116, no. 3)
Journal of Transportation Engineering
Publication Date
July 1, 1992
Author(s)
Suggested Citation
Stephen G. Ritchie (1992) “Closure to “ digital imaging concepts and applications in pavement management ” by Stephen G. Ritchie (May/June, 1990, vol. 116, no. 3)”, Journal of Transportation Engineering, 118(4), pp. 603–605. Available at: 10.1061/(asce)0733-947x(1992)118:4(603.2). conference paper
Determinants of long-distance commuting: Evidence from the 2012 California household travel survey
Proceedings of the 96th annual meeting of the transportation research board
Publication Date
January 1, 2017
Author(s)
Abstract
The determinants of long-distance commuting (i.e., commuting trips longer than 50 miles one way) in the U.S. appear to be poorly understood even though long-distance commuting may have substantial environmental, social, and economic impacts. A review of the commuting literature also shows that commuting and residential self-selection have rarely been studied together, and that few studies have considered how residential land values influence long-distance commuting. In this paper, the authors start addressing these gaps by analyzing the long-distance travel component of the 2012 California Household Travel Survey (CHTS). The authors estimate a generalized structural equation model that explains the impacts of different socio-economic, land use, and land value variables on the likelihood that households commute long-distance. In particular, the authors’ model captures residential self-selection resulting from household socio-economic characteristics. We find that households who reside in areas with a higher mixed density index are less likely to commute long-distance (OR=0.91*), whereas households with a higher car to drivers ratio are more likely to commute long-distance (OR=1.20**). Moreover, although median residential home value is significant, it has no practical importance (OR=0.99***â??1). The authors’ results also illustrate the presence of residential self-selection as land use and land value are influenced by household socio-economic and demographic characteristics. More generally, the empirical evidence presented in this study shows that land use policies can influence long distance commuting and highlights the effectiveness of mixed development for curbing vehicle-miles traveled, which is one way of reducing the environmental impacts of transportation.
Suggested Citation
Suman K. Mitra and Jean-Daniel M. Saphores (2017) “Determinants of long-distance commuting: Evidence from the 2012 California household travel survey”, in Proceedings of the 96th annual meeting of the transportation research board, p. 19p. research report
Public Transportation, Transportation Network Companies (TNCs), and Active Modes
Publication Date
January 1, 2022
Associated Project
Author(s)
Areas of Expertise
Suggested Citation
Jean-Daniel Saphores and Farzana Khatun (2022) Public Transportation, Transportation Network Companies (TNCs), and Active Modes. Research Report. ITS-Irvine. Available at: https://metrans.org/assets/research/psr-19-34_to-035_saphores_final-report.pdf.Related Publications
published journal article |
Dec 2023
Covid-19, intentions to change modes, and how they materialized - Results from a random survey of Californians
Transportation Research Part A: Policy and Practice
policy brief |
Apr 2022
Public Transportation, Transportation Network Companies (TNCs), and Active Modes
research report
The Impact of Labor-Management Relations on Productivity and Efficiency in Urban Mass Transit: Employee Attitudes, Withdrawal Behavior, and Bargaining Unit Structure
Publication Date
March 1, 1980
Associated Project
Author(s)
Final Report
DOT/RSPA/DPB-50/80-5
Suggested Citation
James L. Perry and Harold A. Angle (1980) The Impact of Labor-Management Relations on Productivity and Efficiency in Urban Mass Transit: Employee Attitudes, Withdrawal Behavior, and Bargaining Unit Structure. Final Report DOT/RSPA/DPB-50/80-5. Available at: https://hdl.handle.net/2027/ien.35556021103825. working paper
A Methodology for Activity-Based Travel Analysis: The STARCHILD Model
Publication Date
September 5, 1985
Author(s)
Working Paper
UCI-ITS-WP-85-7, UCI-ITS-AS-WP-85-1
Areas of Expertise
Abstract
This paper presents a policy sensitive approach to modeling travel behavior based on activity pattern analysis.The approach includes the formulation of a theory of complex travel behavior based on a recognition of the full range of interdependencies associated with an individual’s travel decisions in a constrained environment. In the approach advanced travel is viewed as input to a more basic process involving activity decisions. A fundamental tenet of this approach is that travel decisions are driven by the collection of activities that form an agenda for participation; the utility of any specific travel decision can be determined only within the context of the entire agenda.Based on the theory, an operational system of models, STARCHILD (Simulation of Travel/Activity Responses to Complex Household Interactive Logistic Decisions), has been developed to examine the formation of household travel/activity patterns employing a simulation approach in combination with techniques of pattern recognition, multiobjective optimization and disaggregate choice models. Initial empirial verification of the system of models is presented based on results obtained from a sample data set.Conclusions are drawn concerning the merits of activity-based procedures relative to traditional approaches to travel demand modeling.
Suggested Citation
Will Recker, Michael G. McNally and Gregory S. Root (1985) A Methodology for Activity-Based Travel Analysis: The STARCHILD Model. Working Paper UCI-ITS-WP-85-7, UCI-ITS-AS-WP-85-1. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/9sx4p9kj. published journal article
Electric vehicle optimized charge and drive management
ACM Trans. Des. Autom. Electron. Syst.
Publication Date
October 1, 2017
Author(s)
Korosh Vatanparvar, Mohammad Al Faruque