conference paper

Electrification of Off-Road Construction Vehicles: A Comparative Economic Analysis of Electric and Diesel Machinery

Proceedings, 104th Annual Meeting of the Transportation Research Board

Publication Date

January 1, 2025

Abstract

phores, University of California, Irvine This paper evaluates the economic viability of transitioning from diesel to selected off-road electric construction vehicles through a Total Cost of Ownership (TCO) analysis coupled with a Monte Carlo analysis. As global climate change intensifies, the shift toward electric vehicles is crucial for reducing greenhouse gas emissions, particularly in the construction sector, which comprises approximately 1.1% of global annual CO2 emissions. Electrifying off-road construction vehicles would also reduce PM2.5 and noise pollution but face challenges such as high acquisition costs and complex refueling logistics. Our analysis covers 20 models of wheel loaders and excavators, comparing electric equipment with their diesel counterparts. Projections for 2035, aligned with California’s executive order to significantly reduce emissions by that year, indicate that anticipated reductions in battery prices alone will not make the TCO of electric wheel loaders and excavators competitive with their diesel equivalents. This highlights the need for government incentives to facilitate this transition. This study contributes to the literature by providing an economic rationale for adopting off-road electric equipment in the construction sector and should be of interest to regulating agencies, rental firms, and construction companies.

Suggested Citation
Shakib Kafashan and Jean-Daniel Saphores (2025) “Electrification of Off-Road Construction Vehicles: A Comparative Economic Analysis of Electric and Diesel Machinery”, in Proceedings, 104th Annual Meeting of the Transportation Research Board. Washington D.C..

published journal article

Uncovering the contribution of travel time reliability to dynamic route choice using real-time loop data

Transportation Research Part A: Policy and Practice

Publication Date

July 1, 2004

Abstract

Travel time reliability has generally been surmised to be an important attribute of transportation systems. In this paper, we study the contribution of travel time reliability in travelers’ route choice decisions. Traveler’s route choice is formulated as a mixed-logit model, with the coefficients in the model representing individual traveler’s preferences or tastes towards travel time, reliability and cost. Unlike the traditional approach involving the use of traveler surveys to estimate model coefficients and thereby uncover the contribution of travel time reliability, we instead apply the methodology to real-time loop detector data, and use genetic algorithm to identify the parameter set that results in the best match between the aggregated results from traveler’s route choice model and the observed time-dependent traffic volume data from loop detectors. Based on freeway loop data from California State Route 91, we find that the estimated median value of travel-time reliability is significantly higher than that of travel-time, and that the estimated median value of degree of risk aversion indicates that travelers value a reduction in travel time variability more highly than a corresponding reduction in the travel time for that journey. Moreover, travelers’ attitudes towards congestion are not homogeneous; substantial heterogeneity exists in travelers’ preference of travel time and reliability. Our results validate results from previous studies involving the California State Route 91 value-pricing project that were based on traditional traveler surveys and demonstrate the applicability of the approach in travelers’ behavioral studies. (C) 2004 Elsevier Ltd. All rights reserved.

Suggested Citation
Henry X. Liu, Will Recker and Anthony Chen (2004) “Uncovering the contribution of travel time reliability to dynamic route choice using real-time loop data”, Transportation Research Part A: Policy and Practice, 38(6), pp. 435–453. Available at: 10.1016/j.tra.2004.03.003.

conference paper

Trust based security for cognitive radio networks

Proceedings of the 12th international conference on information integration and web-based applications & services - iiWAS '10

Publication Date

January 1, 2010

Author(s)

Sazia Parvin, Song Han, Farookh Khadeer Hussain, Mohammad Al Faruque
Suggested Citation
Sazia Parvin, Song Han, Farookh Khadeer Hussain and Md. Abdullah Al Faruque (2010) “Trust based security for cognitive radio networks”, in Proceedings of the 12th international conference on information integration and web-based applications & services - iiWAS '10. ACM Press, pp. 743–748. Available at: 10.1145/1967486.1967605.

policy brief

Planning Light- and Heavy-Duty ZEV Infrastructure for a More Resilient Fueling Network in California

Publication Date

March 1, 2026

Author(s)

Abstract

To meet goals for air quality improvement and greenhouse gas reduction, California aims to expand both light-duty and heavy-duty zero-emission vehicles (ZEVs). To support these aims, the State has set targets for the number of electric charging and hydrogen fueling stations, but deployment is falling short of these targets. For example, there were only 50 hydrogen stations and just over 200,000 chargers as of September 2025, as compared to the goals for this year, set in 2018, of 200 hydrogen stations and 250,000 electric vehicle chargers. Building a large, reliable, equitable network in a short time presents challenges of scale, reliability, and resiliency. One possible way to address these challenges is to combine light-and heavy-duty vehicle charging and fueling infrastructure, given the overlap of these vehicles’ travel patterns and of the respective charging and fueling technologies used. The research investigates how this strategy could support robust charging and refueling networks for projected ZEV growth. To that end, the research also developed a “conservative” and an “optimistic” scenario to simulate charging and hydrogen fueling station deployment across California for 2025, 2035, and 2045.

Suggested Citation
Kate Forrest, Benjamin Hudson, Blake Lane and Scott Samuelsen (2026) Planning Light- and Heavy-Duty ZEV Infrastructure for a More Resilient Fueling Network in California. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2r49p5f.

conference paper

Evaluating the impacts of start-up and clearance behaviors in a signalized network: A network fundamental diagram approach

Proceedings of the 98th annual meeting of the transportation research board

Publication Date

January 1, 2019

Abstract

Numerical simulations have shown that the network fundamental diagram (NFD) of a signalized network is significantly affected by the green ratio, and an analytical approximation of the NFD has been derived from the link transmission model.However, the consistency between these approaches has not been established, and the impacts of other factors are still unrevealed. In this paper, the authors evaluate the impacts of start-up and clearance behaviors in a signalized network from a network fundamental diagram approach. Microscopic simulations based on Newellâ??s car-following model are used for testing the bounded acceleration (start-up) and aggressiveness (clearance) effects on the shape of the NFD in a signalized ring road.This new approach is shown to be consistent with theoretical results from the link transmission model, when the acceleration is unbounded and vehicles have the most aggressive clearance behaviors. This consistency validates both approaches; but the link transmission model cannot be easily extended to incorporate more realistic start-up or clearance behaviors. With the new approach, the authors demonstrate that both bounded acceleration and different aggressiveness lead to distinct network capacities and fundamental diagrams. In particular, they lead to start-up and clearance lost times of several seconds; and these lost times are additive. Therefore, the important role that these behaviors play in the NFD shape is studied to reach a better understanding of how the NFD responds to changes. This will help the authors to design better start-up and clearance behaviors for connected and autonomous vehicles

Suggested Citation
Adria Morales Fresquet and Wenlong Jin (2019) “Evaluating the impacts of start-up and clearance behaviors in a signalized network: A network fundamental diagram approach”, in Proceedings of the 98th annual meeting of the transportation research board, p. 20p.

research report

Energy commission models for analyzing and projecting household transportation energy demand: Evaluation, model improvement options, and recommendations

Publication Date

January 1, 2016

Author(s)

David Bunch, David Brownstone
Suggested Citation
David S. Bunch and David Brownstone (2016) Energy commission models for analyzing and projecting household transportation energy demand: Evaluation, model improvement options, and recommendations. University of California, Davis and University of California, Irvine.

published journal article

Carve-outs under airline antitrust immunity

International Journal of Industrial Organization

Publication Date

November 1, 2010

Author(s)

Jan Brueckner, Stef Proost
Suggested Citation
Jan K. Brueckner and Stef Proost (2010) “Carve-outs under airline antitrust immunity”, International Journal of Industrial Organization, 28(6), pp. 657–668. Available at: 10.1016/j.ijindorg.2010.03.006.

working paper

A Search for Performance Evaluation in Public Services: Education, Housing and Health

Publication Date

December 1, 1977

Author(s)

Dathron Bailey, Michael Spendolini

Working Paper

UCI-ITS-WP-77-11

Abstract

As public funds become ever more scarce and demands on them ever greater, public scrutiny of their use increases. Means are sought to determine exactly how such funds are being used, and to determine where and how they could be better allocated. The quantitative evaluation of performance provides some measure of rational justification for political and policy decisions. Public transit is today in this position of stabilized or decreasing funds and increasing demands, yet there exist no readily applicable means of evaluating transit performance. Transit must adapt the evaluation techniques and learn from the experience of other public fields. Performance evaluation has long been an issue in the fields of public education, housing, and health. Many volumes of research are available discussing evaluation theory and experience with techniques ranging from performance contracts and peer ratings to subjective ratings of “satisfaction”. Performance evaluations are also conducted in many other public service fields, e.g. fire and police services. Yet, the fields of education, housing, and health are similar to public transit in that they: (1) must be provided on a continuous basis; (2) cannot be nor mally justified on a public safety basis, as can police and fire ser vices; and (3) are not utilized by the entire population on a regular basis. This paper will investigate each of the fields (public education, housing, and health) in turn, discussing the predominant evaluation techniques used or suggested for that field and the problems inhibit ing’ evaluation. For each area, appropriate parallels will be drawn to the evaluation of public transit.

Suggested Citation
Dathron Bailey and Michael J. Spendolini (1977) A Search for Performance Evaluation in Public Services: Education, Housing and Health. Working Paper UCI-ITS-WP-77-11. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/2xq628bk.

conference paper

Under Pressure: Effectiveness and Usability of the Apple Pencil as a Biometric Authentication Tool

Proceedings 2024 Symposium on Usable Security

Publication Date

January 1, 2024

Author(s)

Elina Van Kempen, Zane Karl, Richard Deamicis, Qi Alfred Chen
Suggested Citation
Elina Van Kempen, Zane Karl, Richard Deamicis and Qi Alfred Chen (2024) “Under Pressure: Effectiveness and Usability of the Apple Pencil as a Biometric Authentication Tool”, in Proceedings 2024 Symposium on Usable Security. San Diego, CA, USA: Internet Society. Available at: 10.14722/usec.2024.23056.