published journal article
Applied choice analysis: A primer
Journal of The American Statistical Association
Publication Date
March 1, 2007
Archives: Research Products
conference paper
Assessing effectiveness of changeable message signs on secondary crashes
Proceedings of the 90th annual meeting of the transportation research board
Publication Date
January 1, 2011
Author(s)
Abstract
Changeable Message Signs (CMS) provide motorists with real-time traffic information about traffic congestion, incidents, roadwork zones, speed limits ahead, and Amber alerts. Although they require substantial investments, little appears to be known about their effectiveness. The purpose of this paper is to investigate empirically whether CMS reduce the number of secondary incidents. Our unique dataset combines 2008 weather data with geometric information, road work information, and 2008 accident data for a 74 miles stretch of Interstate 5 from the Mexico-US border to Orange County, CA. This freeway, which has 4 to 6 lanes in each direction and a maximum AADT volume of 230,000 vehicles, is equipped with 11 CMS. Our data suggest that secondary crashes represent approximately 5.2 percent of all primary incidents. We estimate a simple logit model to analyze the factors that contribute to secondary incidents. We find mild evidence that CMS reduce secondary crashes; their influence extends approximately 22 miles downstream from their location, with a maximum at approximately 11 miles. These results have implications for investments in CMS to provide information to motorists, although inter-vehicle communication may soon offer a viable alternative to CMS.
Suggested Citation
Lima Kopitch and Jean-Daniel Saphores (2011) “Assessing effectiveness of changeable message signs on secondary crashes”, in Proceedings of the 90th annual meeting of the transportation research board, p. 16p. published journal article
Dually sustainable urban mobility option: Shared-taxi operations with electric vehicles
International Journal of Sustainable Transportation
Publication Date
September 1, 2015
Author(s)
Jae Young Jung, R. (Jay) Jayakrishnan, Keechoo Choi
Suggested Citation
Jaeyoung Jung, R. Jayakrishnan and Keechoo Choi (2015) “Dually sustainable urban mobility option: Shared-taxi operations with electric vehicles”, International Journal of Sustainable Transportation, 11(8), pp. 567–581. Available at: 10.1080/15568318.2015.1092057. conference paper
A joint TOA and DOA approach for positioning with LTE signals
2018 IEEE/ION position, location and navigation symposium (PLANS)
Publication Date
April 1, 2018
Author(s)
Kimia Shamaei, Joe Khalife, Zaher Kassas
Suggested Citation
Kimia Shamaei, Joe Khalife and Zaher M. Kassas (2018) “A joint TOA and DOA approach for positioning with LTE signals”, in 2018 IEEE/ION position, location and navigation symposium (PLANS). IEEE, pp. 81–91. Available at: 10.1109/plans.2018.8373368. working paper
Markets and regulatory hold-up problems
Publication Date
October 28, 1998
Associated Project
Author(s)
Areas of Expertise
Abstract
Many regulatory programs such as environmental regulation are effective only if firms make irreversible investments that reduce the cost of compliance. A firm potentially subject to regulation may therefore behave strategically by not investing, thereby forcing the regulator to void the proposed regulation. We show that such incentives, which resemble a hold-up problem, may not be overcome when government�s only tool is the imposition of an emissions tax. The hold-up problem can be overcome by the issuance of tradeable permits. A time-consistent equilibrium exists with all firms investing and the government imposing regulations, even if no permits are traded and their market price is low. Indeed, an observation of no trade may indicate that pollution abatement is great.
Related Publications
working paper |
Dec 1994
Hazard Models of Changing Household Demographics
working paper |
Sep 1994
Population and Employment Densities: Structure and Change
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
research report
Assessment of Preferences and Perceptions Toward Attributes of Transportation Alternatives
Publication Date
January 1, 1974
Author(s)
Thomas Golob, Ricardo Dobson
Report Number
149
Abstract
This paper integrates psychological measurement and economic utility theories to derive an approach for enhancing the understanding of decision-making behavior with respect to transportation-related alternatives. Examples of theoretical formulations, empirical tests, and data collection procedures are selected from a body of transportation research, market research, econometric, and psychometric literature. The research and theoretical activities of diverse disciplines appear to be compatible with a general schema, which is proposed for the prediction of transportation-related decisions. The schema is centered on the description of transportation-related alternatives in terms of multiple characteristics or attributes. The choice of an individual decision-maker or class of decision-makers is assumed to be mediated by preferences and perceptions toward this attribute set. This schema is also used to indicate how new models may be developed to produce more valid predictions than are currently available from existing models.
Suggested Citation
Thomas F. Golob and Ricardo Dobson (1974) Assessment of Preferences and Perceptions Toward Attributes of Transportation Alternatives. 149. Available at: https://trid.trb.org/View/25842. conference paper
Towards parallel execution of IEC 61131 industrial cyber-physical systems applications
2012 design, automation & test in europe conference & exhibition (DATE)
Publication Date
March 1, 2012
Author(s)
A. Canedo, Mohammad Al Faruque
Suggested Citation
A. Canedo and M.A. Al-Faruque (2012) “Towards parallel execution of IEC 61131 industrial cyber-physical systems applications”, in 2012 design, automation & test in europe conference & exhibition (DATE). IEEE, pp. 554–557. Available at: 10.1109/date.2012.6176530. research report
Driving California’s Transportation Emissions to Zero
Publication Date
April 1, 2021
Associated Project
Author(s)
Austin L. Brown, Daniel Sperling, Bernadette Austin, J. R. DeShazo, Lew Fulton, Timothy Lipman, Colin W. Murphy, Jean-Daniel Saphores, Gil Tal, Carolyn Abrams, Debapriya Chakraborty, Daniel Coffee, Esmaeil (Sina) Dabbagh, Adam Davis, Mark A. Delucchi, Kelly L. Fleming, Kate Forest, Juan Carlos Garcia Sanchez, Susan Handy, Michael Hyland, Alan Jenn, Seth Karten, Blake Lane, Michael Mackinnon, Elliot Martin, Marshall Miller, Monica Ramirez-Ibarra, Stephen Ritchie, Sara Schremmer, Joshua Segui, Susan Shaheen, Andre (Yeow Chern) Tok, Aditya Voleti, Julie Witcover, Allison Yang
Areas of Expertise
Abstract
The purpose of this report is to provide a research-driven analysis of options that can put California on a pathway to achieve carbon-neutral transportation by 2045. The report comprises thirteen sections. Section 1 provides an overview of the major components of transportation systems and how those components interact. Section 2 discusses the impacts the COVID-19 pandemic has had on transportation. Section 3 discusses California’s current transportation-policy landscape. These three sections were previously published as a synthesis report. Section 4 analyzes the different carbon scenarios, focusing on “business as usual” (BAU) and Low Carbon (LC1). Section 5 provides an overview of key policy mechanisms to utilize in decarbonizing transportation. Section 6 is an analysis of the light-duty vehicle sector, section 7 is the medium- and heavy-duty vehicle sectors, section 8 is reducing and electrifying vehicle miles traveled, and section 9 is an analysis of transportation fuels and their lifecycle. The following sections are an analysis of external costs and benefits: section 10 analyzes the health impacts of decarbonizing transportation, section 11 analyzes equity and environmental justice, and section 12 analyzes workforce and labor impacts. Finally, future research needs are provided in section 13. The study overall finds that cost-effective pathways to carbon-neutral transportation in California exist, but that they will require significant acceleration in a wide variety of policies.
Suggested Citation
Austin L. Brown, Daniel Sperling, Bernadette Austin, J. R. DeShazo, Lew Fulton, Timothy Lipman, Colin W. Murphy, Jean Daniel Saphores, Gil Tal, Carolyn Abrams, Debapriya Chakraborty, Daniel Coffee, Sina Dabag, Adam Davis, Mark A. Delucchi, Kelly L. Fleming, Kate Forest, Juan Carlos Garcia Sanchez, Susan Handy, Michael Hyland, Alan Jenn, Seth Karten, Blake Lane, Michael Mackinnon, Elliot Martin, Marshall Miller, Monica Ramirez-Ibarra, Stephen Ritchie, Sara Schremmer, Joshua Segui, Susan Shaheen, Andre Tok, Aditya Voleti, Julie Witcover and Allison Yang (2021) Driving California’s Transportation Emissions to Zero. Available at: https://escholarship.org/uc/item/3np3p2t0 (Accessed: October 11, 2023). conference paper
Automated cross-platform reverse engineering of CAN bus commands from mobile apps
Proceedings 2020 Network and Distributed System Security Symposium (NDSS'20)
Publication Date
January 1, 2020
Author(s)
Haohuang Wen, Qingchuan Zhao, Qi Alfred Chen, Zhiqiang Lin
Suggested Citation
Haohuang Wen, Qingchuan Zhao, Qi Alfred Chen and Zhiqiang Lin (2020) “Automated cross-platform reverse engineering of CAN bus commands from mobile apps”, in Proceedings 2020 Network and Distributed System Security Symposium (NDSS'20). Available at: https://par.nsf.gov/servlets/purl/10139471 (Accessed: October 11, 2023). published journal article
Emissions impacts of plug-in hybrid electric vehicle deployment on the U.S. western grid
Journal of Power Sources
Publication Date
August 1, 2010
Author(s)
Karel H. Jansen, Tim Brown, Scott Samuelsen
Abstract
The constantly evolving western grid of the United States is characterized by complex generation dispatch based on economics, contractual agreements, and regulations. The future electrification of transportation via plug-in electric vehicles calls for an energy and emissions analysis of electric vehicle (EV) penetration scenarios based on realistic resource dispatch. A resource dispatch and emissions model for the western grid is developed and a baseline case is modeled. Results are compared with recorded data to validate the model and provide confidence in the analysis of EV-grid interaction outlooks. A modeled dispatch approach, based on a correlation between actual historical dispatch and system load data, is exercised to show the impacts (emission intensity, temporally resolved load demand) associated with EV penetration on the western grid. The plug-in hybrid electric vehicle (PHEV) and selected charging scenarios are the focus for the analysis. The results reveal that (1) a correlation between system load and resource group capacity factor can be utilized in dispatch modeling, (2) the hourly emissions intensity of the grid depends upon PHEV fleet charge scenario, (3) emissions can be reduced for some species depending on the PHEV fleet charge scenario, and (4) the hourly model resolution of changes in grid emissions intensity can be used to decide on preferred fleet-wide charge profiles. (C) 2010 Elsevier B.V. All rights reserved.