Archives: Research Products

working paper

Benefits, Acceptance, and Marketability of Value-Priced Services: California's Route 91 Express Lanes

Publication Date

September 1, 1998

Author(s)

Kenneth Small, Emily Parkany, David R. Anderson

Working Paper

UCI-ITS-WP-98-7

Areas of Expertise

Transportation Economics, Funding, & Finance Travel Behavior, Land Use, & the Built Environment
View working paper

Abstract

Transportation professionals have always been interested in how travelers respond to different transportation options. A new application of congestion pricing offers the opportunity to extend such research to situations where travelers face a priced alternative. Travelers along State Route 91 (SR 91) in Southern California can now pay a time-varying fee in order to travel on a set of essentially congestion-free “Express Lanes” located in the median of a very congested preexisting freeway. For this study, we conduct a mail survey of such travelers to learn how they decide to use the free lanes or the toll lanes. We use the data to estimate route choice models and models that incorporate various types of real-time information about accidents, traffic conditions, and price levels into the route choice decision. This study provides new information about the acceptance of congestion pricing, the use of real-time information in making dynamic travel decisions, and individual travelers’ interests in forming carpools.

Suggested Citation
Kenneth A. Small, Emily Parkany and David R. Anderson (1998) Benefits, Acceptance, and Marketability of Value-Priced Services: California's Route 91 Express Lanes. Working Paper UCI-ITS-WP-98-7. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/57r1z2s2.

published journal article

Drivers' willingness-to-pay to reduce travel time: Evidence from the San Diego I-15 congestion pricing project

Transportation Research Part A: Policy and Practice

Publication Date

May 1, 2003

Author(s)

David Brownstone, Arindam Ghosh, Thomas Golob, Camilla Kazimi, Dirk Van Amelsfort
View published journal article

Abstract

The adoption of congestion pricing depends fundamentally upon drivers’ willingness to pay to reduce travel time during the congested morning peak period. Using revealed preference data from a congestion pricing demonstration project in San Diego, we estimate that willingness to pay to reduce congested, travel time is higher than previous stated preference results. Our estimate of median willingness to pay to reduce commute time is roughly $30 per hour, although this may be biased upward by drivers’ perception that the toll facility provides safer driving conditions. Drivers also use the posted toll as an indicator of abnormal congestion and increase their usage of the toll facility when tolls are higher than normal. (C) 2003 Elsevier Science Ltd. All rights reserved.

Suggested Citation
David Brownstone, Arindam Ghosh, Thomas F Golob, Camilla Kazimi and Dirk Van Amelsfort (2003) “Drivers' willingness-to-pay to reduce travel time: Evidence from the San Diego I-15 congestion pricing project”, Transportation Research Part A: Policy and Practice, 37(4), pp. 373–387. Available at: 10.1016/s0965-8564(02)00021-6.

published journal article

A mathematical logic approach for the transformation of the linear conditional piecewise functions of dispersion-and-store and cell transmission traffic flow models into linear mixed-integer form

Transportation Science

Publication Date

February 1, 2009

Author(s)

Yannis Pavlis, Will Recker
View published journal article
Suggested Citation
Yannis Pavlis and Will Recker (2009) “A mathematical logic approach for the transformation of the linear conditional piecewise functions of dispersion-and-store and cell transmission traffic flow models into linear mixed-integer form”, Transportation Science, 43(1), pp. 98–116. Available at: 10.1287/trsc.1080.0254.

MS Thesis

Peer-to-peer residential charger sharing exploring public perceptions in california

Publication Date

January 1, 2024

Author(s)

Amin Akbari
View MS Thesis

Abstract

The widespread adoption of electric vehicles (EVs) faces significant infrastructure challenges, particularly regarding charging accessibility. This thesis investigates peer-to-peer residential charger sharing (P2P-EVSE), an innovative system that connects households with underutilized electric vehicle supply equipment (EVSE) to EV drivers seeking convenient charging options. This research examined the feasibility and acceptance factors of P2P-EVSE platforms through a comprehensive survey of 367 California households with EVs. The study employed a mixed-methods approach, combining quantitative survey analysis with qualitative assessment of user preferences and concerns. The survey instrument included questions about charging habits, sharing preferences, economic motivations, personality traits, and demographic characteristics.Analysis of survey responses revealed that 28% of respondents showed interest in hosting their chargers, while 31% expressed willingness to rent through P2P-EVSE platforms. Statistical analysis identified economic incentives, outgoing personality traits, and support for alternative charging policies as the strongest predictors of participation intention. Hosts prioritized damage reimbursement guarantees and equipment control, while renters emphasized convenience and cost savings. Both groups cited liability concerns as the primary participation barrier, with environmental benefits being a secondary consideration. The findings demonstrated that EV owners in detached houses showed reduced interest in renting, while high-mileage drivers and those with daily charging needs exhibited increased willingness to participate. The research suggests that P2P-EVSE could particularly benefit multi-unit dwelling residents, addressing a known barrier to EV adoption. Higher adoption potential is predicted in regions like Southern California, where significant cost differences exist between home and public charging options.

Suggested Citation
Amin Akbari (2024) Peer-to-peer residential charger sharing exploring public perceptions in california. MS Thesis. University of California, Irvine. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/17uq3m8/alma991035687098204701.

published journal article

Experimental and modeling investigation of the effect of air preheat on the formation of NOx in an RQL combustor

Heat and Mass Transfer

Publication Date

October 1, 2012

Author(s)

Scott Samuelsen, Jack Brouwer, M.A. Vardakas, J.D. Holdeman
View published journal article
Suggested Citation
G.S. Samuelsen, J. Brouwer, M.A. Vardakas and J.D. Holdeman (2012) “Experimental and modeling investigation of the effect of air preheat on the formation of NOx in an RQL combustor”, Heat and Mass Transfer, 49(2), pp. 219–231. Available at: 10.1007/s00231-012-1080-0.

policy brief

New Insights from Satellite Data Show the Impact Trucks are Having on Communities in Southern California

Publication Date

March 1, 2025

Associated Project

Author(s)

Jun Wu

Areas of Expertise

Freight, Logistics, & Supply Chain Intelligent Transportation Systems, Emerging Technologies, & Big Data
View policy brief

Abstract

The rapid growth in freight transportation, particularly heavy-duty trucks, poses significant environmental and public health challenges for communities near major ports and freeways. In areas such as those near the Port of Los Angeles and the I-710 corridor, communities are exposed to elevated levels of air pollution, noise pollution, and associated health risks. Traditional traffic data collection methods primarily concentrate on gathering traffic volume data for freeway segments or smaller areas, often overlooking heavy-duty vehicles across roadway networks and in local communities. To better understand the environmental impact and spatial distribution of heavy-duty truck traffic, this research employed a deep learning approach to analyze satellite imagery and publicly accessible spatial data. This approach allowed identification and categorization of heavy-duty trucks and shipping containers along critical freight routes and analysis of impacts on adjacent communities.

Suggested Citation
Jun Wu (2025) New Insights from Satellite Data Show the Impact Trucks are Having on Communities in Southern California. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g25719c9.

Related Publications

published journal article | Jan 2024

A Deep-Learning Approach to Detect and Classify Heavy-Duty Trucks in Satellite Images
IEEE Transactions on Intelligent Transportation Systems

published journal article

On the existence of stationary states in general road networks

Transportation Research Part B: Methodological

Publication Date

November 1, 2015

Author(s)

Wenlong Jin
View published journal article

Abstract

Our daily driving experience and empirical observations suggest that traffic patterns in a road network are relatively stationary during peak periods. In numerous transportation network studies, there has been an implicit conjecture that stationary states exist in a network when origin demands, route choice proportions, and destination supplies are constant. In this study, we first rigorously formulate the conjecture within the framework of a network kinematic wave theory with an invariant junction model. After defining stationary states, we derive a system of algebraic equations in 3-tuples of stationary link flow-rates, demands, and supplies. We then introduce a new definition of junction critical demand levels based on effective demands and supplies. With a map in critical demand levels, we show that its fixed points and, therefore, stationary states exist with the help of Brouwer’s fixed point theorem. For two simple road networks, we show that the map is well-defined and can be used to solve stationary states with a brute-force method. Finally we summarize the study and present some future extensions and applications. (C) 2015 Elsevier Ltd. All rights reserved.

Suggested Citation
Wen-Long Jin (2015) “On the existence of stationary states in general road networks”, Transportation Research Part B: Methodological, 81(3, SI), pp. 917–929. Available at: 10.1016/j.trb.2015.05.010.

conference paper

Eco-Friendly automotive climate control and navigation system for electric vehicles

2016 ACM/IEEE 7th international conference on cyber-physical systems (ICCPS)

Publication Date

April 1, 2016

Author(s)

Korosh Vatanparvar, Mohammad Al Faruque
View conference paper
Suggested Citation
Korosh Vatanparvar and Mohammad Abdullah Al Faruque (2016) “Eco-Friendly automotive climate control and navigation system for electric vehicles”, in 2016 ACM/IEEE 7th international conference on cyber-physical systems (ICCPS). IEEE, pp. 1–10. Available at: 10.1109/iccps.2016.7479101.

conference paper

Building sustainability indicators for Los Angeles

Proceedings of CIC's 7 th annual conference, bellevue, washington

Publication Date

October 1, 2009

Author(s)

Jean-Daniel Saphores
Suggested Citation
J. Saphores (2009) “Building sustainability indicators for Los Angeles”, in Proceedings of CIC's 7 th annual conference, bellevue, washington.

working paper

On Form Versus Function: Will the "New Urbanism" Reduce Traffic or Increase It?

Publication Date

July 1, 1995

Author(s)

Randall Crane

Working Paper

UCI-ITS-WP-95-12, UCTC 266
View working paper

Abstract

A major attraction of the popular and influential planning movements known as ‘the new urbanism’, ‘transit-oriented development’, and ‘neotraditional planning’ are their presumed transportation benefits. Though the architects and planners promoting these ideas are usually careful to emphasize the many ingredients necessary to obtain desired results — the straightening of streets to open the local network, the ‘calming’ of traffic, the better integration of land uses and densities, and so on — a growing literature and number of plans feature virtually any combination of these elements as axiomatic improvements.The potential problem is that the traffic impacts of the new plans are generally indeterminate, and it is unclear designers understand the reasons well enough to avoid unintended results. This paper proposes a simple behavioral model to identify and assess the tradeoffs these ideas impose on transportation and subdivision planners.

Suggested Citation
Randall Crane (1995) On Form Versus Function: Will the "New Urbanism" Reduce Traffic or Increase It?. Working Paper UCI-ITS-WP-95-12, UCTC 266. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/7bj9g6bg.

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