conference paper

Envy-free pricing for collaborative consumption of supply in transportation systems

Papers selected for the 22nd international symposium on transportation and traffic theory

Publication Date

January 1, 2017

Abstract

Consumption of supply in transportation systems has generally always followed a First-Come-First-Served (FCFS) rule. This article proposes new control policies based on the concept of envy-freeness which outperform FCFS in both efficiency and fairness. We call an allocation envy-free when no agent feels any other agent’s allocation to be better than their own, at the current price. Envy-free allocations are thus considered fair. Several new contributions are made: we first present a conceptual theoretical supply demand framework which formally introduces the new supply paradigm. We propose and simulate a new problem, queue jumping operations on highways, in which vehicles can skip positions in a queue and compensate the overtaken vehicles with a payment. We present a new concept, dynamic envy-freeness, and provide a new envy ranking criterion, Constant Elasticity of Substitution Envy Intensity (CESEI) that is applied to PEXIC, an exchange-based traffic signal control scheme. (C) 2017 The Authors. Elsevier B.V. All rights reserved.

Suggested Citation
Roger Lloret-Batlle and R. Jayakrishnan (2017) “Envy-free pricing for collaborative consumption of supply in transportation systems”, in . Mahmassani, H and Nie, Y and Smilowitz, K (ed.) Papers selected for the 22nd international symposium on transportation and traffic theory. ELSEVIER SCIENCE BV (Transportation research procedia), pp. 772–789. Available at: 10.1016/j.trpro.2017.05.043.

published journal article

Continuous formulations and analytical properties of the link transmission model

Transportation Research Part B: Methodological

Publication Date

April 1, 2015

Author(s)

Suggested Citation
Wen-Long Jin (2015) “Continuous formulations and analytical properties of the link transmission model”, Transportation Research Part B: Methodological, 74, pp. 88–103. Available at: 10.1016/j.trb.2014.12.006.

conference paper

A Structural Analysis of COVID-19 Spread and Human Mobility in the Early Phase of the Pandemic

101st Annual Meeting of the Transportation Research Board

Publication Date

January 1, 2022

Author(s)

Rezwana Rafiq, Tanjeeb Ahmed, Yusuf Sarwar Uddin
Suggested Citation
Rezwana Rafiq, Tanjeeb Ahmed and Md Yusuf Sarwar Uddin (2022) “A Structural Analysis of COVID-19 Spread and Human Mobility in the Early Phase of the Pandemic”. 101st Annual Meeting of the Transportation Research Board.

policy brief

California Can Simplify the Housing Element Law to Reduce Administrative Burdens and Improve Social Equity

Publication Date

February 1, 2021

Abstract

California’s Housing Element law requires all local governments to adequately plan to meet the state’s existing and future housing needs. The law establishes processes for determining regional housing needs and requires regional councils of governments (COGs) with allocating these housing needs to cities and counties in the form of numerical targets. Local governments must update the housing element of their general plans and adopt policies to accommodate the housing targets. The California Department of Housing and Community Development (HCD) reviews all local housing elements and determines whether the elements comply with state law.

Suggested Citation
Huixin Zheng, Nicholas J. Marantz, Doug Houston and Jae Hong Kim (2021) California Can Simplify the Housing Element Law to Reduce Administrative Burdens and Improve Social Equity. Policy Brief. Available at: https://escholarship.org/uc/item/7p94n1cd (Accessed: October 11, 2023).

policy brief

Can Green Hydrogen Be a Cost Competitive Transportation Fuel by 2030?

Abstract

There is growing international interest in electrolytic hydrogen produced from renewable energy (often referred to as green hydrogen) as a potential zero-emission alternative to gasoline and diesel in a variety of on-road and off-road transportation applications. Currently, gasoline and diesel are priced around $4 per gallon at the pump and a gallon of either fuel is roughly the equivalent of one kilogram of hydrogen based on energy content. Although hydrogen vehicles are generally more efficient than those fueled by petroleum, transporting and dispensing hydrogen is more expensive than for conventional fuel, so hydrogen must reach a cost substantially below $4/kg, possibly as low as $2/kg, to be a cost competitive option. Is this achievable? In short, this depends on the extent to which green hydrogen markets scale up globally. Projections of future green hydrogen production costs are generally in the range of $2–$4/kg by 20301 ; however, some expect faster and deeper declines reaching as low as $1.5/kg by 20302 and even $1/kg by 2030 under ideal conditions.3 This brief examines the evidence in support of green hydrogen production achieving a cost at or below $2/kg starting from its current level of between $5 and $6/kg,4 and assesses the time point at which this cost benchmark could be achieved.

Suggested Citation
Jeff Reed (2022) Can Green Hydrogen Be a Cost Competitive Transportation Fuel by 2030?. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2513wj8.

Preprint Journal Article

Fleet Operator Perspectives on Alternative Fuels for Heavy-Duty Vehicles

Abstract

Despite the deployment of alternative fuel vehicles (AFVs) being one of the promising measures to reduce air pollutants and greenhouse gas emissions, AFVs still represent a very small share in the heavy-duty vehicle (HDV) sector. Understanding HDV fleet operator perspectives on alternative fuels is critical to developing effective demand-side strategies to facilitate wider and more rapid adoption of heavy-duty AFVs. This study explored California HDV fleet operator perspectives on viable alternative fuel options in the next 10 to 20 years, along with motivators for, and barriers to, such adoption. Eighteen in-depth qualitative interviews were conducted, after which thematic analysis was employed to analyze the interview data. Electric, hydrogen, compressed natural gas (CNG), and hybrid options were commonly perceived as viable in the 2030s by the participating organizations. Various optimistic aspects were addressed, including advanced technologies and emission reduction benefits (electric/hydrogen), continued fuel commitments due to their fleet or infrastructure investments already made (CNG), and lower complexity in fleet routing along with favorable driver acceptance (hybrid options). However, many concerns and uncertainties were also reported, including functional unsuitability (electric), uncompetitive upfront costs (hydrogen), unready infrastructure, perceived unavailability of vehicles, uncertain return on investment (electric/hydrogen), and unpromising support from state government (CNG). The study findings help fill a key knowledge gap in AFV fleet adoption research regarding HDV fleet operator perspectives, and contribute to developing demand-side strategies to aid the success of AFV diffusion throughout the HDV market.

Suggested Citation
Youngeun Bae, Craig R. Rindt, Suman Mitra and Stephen G. Ritchie (2022) “Fleet Operator Perspectives on Alternative Fuels for Heavy-Duty Vehicles”. Rochester, NY: SSRN. Available at: https://papers.ssrn.com/abstract=4253440 (Accessed: October 5, 2023).

conference paper

Security-aware functional modeling of cyber-physical systems

2015 IEEE 20th conference on emerging technologies & factory automation (ETFA)

Publication Date

September 1, 2015

Author(s)

Jiang Wan, Arquimedes Canedo, Mohammad Al Faruque
Suggested Citation
Jiang Wan, Arquimedes Canedo and Mohammad Abdullah Al Faruque (2015) “Security-aware functional modeling of cyber-physical systems”, in 2015 IEEE 20th conference on emerging technologies & factory automation (ETFA). IEEE, pp. 1–4. Available at: 10.1109/etfa.2015.7301644.

working paper

Ventura/Lompoc Smart Card Demonstration Evaluation: Final Report Volume 1 Technical Performance, User Response, and Institutional Analysis

Abstract

This report presents evaluation results of the Smart Card Phase III FieldDemonstration. Its purpose is to demonstrate the feasibility of using Smart Cards and othertechnology to provide an integrated fare medium across several transit operators. TheDemonstration took place from May 1995 through June 1997, and it was located in VenturaCounty, California. Participants included seven transit agencies, with the Ventura CountyTransportation Commission acting as the lead local agency. The technology deployed is anintegrated fare transaction and vehicle management/monitoring system, termed FareTransVMS. Major system elements include smart passenger fare cards, fare transactionhardware and software, automatic passenger counters, a geo-positioning system, andassociated communications hardware and software.The evaluation addressed technical performance, user response, and institutionalissues. Many problems were encountered in installing and deploying the hardware andsoftware, and equipment failures continued throughout the demonstration. Communicationsproblems prevented complete deployment of the system and implementation of all plannedsupport functions, though most technical elements were ultimately put into revenue servicein the field. Technical problems were often the outcome of institutional issues. The systemwas deployed before adequate testing could take place. Problems at specific sites were dueto inadequate training, lack of maintenance and trouble-shooting procedures, etc. AlthoughSmart Card users were very satisfied with the new fare medium, few transit users boughtand used the cards. Transit patrons in Ventura County have very low incomes, and manyare not English speakers. Smart Cards are more attractive to higher income, discretionaryriders. Overall, the demonstration suffered from the absence of clear roles andresponsibilities, as well as a lack of understanding of the complexity and demands of thetechnology. Despite deployment problems, however, participating agencies were generallyenthusiastic about the FareTrans VMS, and ultimately it became a permanent part of transitoperations in the county.

book/book chapter

Ethics and the policy of extraordinary rendition

Publication Date

January 1, 2015

Author(s)

Joseph Dimento, G. Geis
Suggested Citation
J.F.C. DiMento and G. Geis (2015) “Ethics and the policy of extraordinary rendition”, in Science, ethics, and politics: Conversations and investigations, pp. 192–211.

working paper

Relationships Between Social-Psychological Variables and Individual Travel Behavior

Publication Date

April 1, 1978

Working Paper

UCI-ITS-WP-78-7

Abstract

The purpose of this paper is to introduce variables ·which may yield explanations of travel behavior which go beyond the economic and transportation-related explanations of existing models. This analysis explores whether improvements can be made in the understanding of individual travel behavior and in the predictive power of travel demand models. This applied emphasis extends the author’s previous work which demonstrated how attitudinal and behavioral information can be used to structure the development and marketing of transportation improvements (Fielding, 1972; Fielding, et.al., 1976).

Suggested Citation
Gordon J. Fielding and Timothy J. Tardiff (1978) Relationships Between Social-Psychological Variables and Individual Travel Behavior. Working Paper UCI-ITS-WP-78-7. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/7945t2zr.