working paper

Integrated Construction Zone Traffic Management

Abstract

Nonrecurrent traffic congestion caused by construction work constitutes a large proportion of the traffic congestion on highways. In TO 5300, we developed a comprehensive work zone traffic impact assessment procedure using a series of state-of-the-art dynamic network analysis tools as building blocks. This procedure is then implemented into a work zone traffic impact assessment software package called NetZone. This software package is capable of estimating time-dependent travel demand based on link counts, estimating demand diversion in response to work zone delay and various traffic management measures, showing traffic congestion level in the network over time, and providing network wide traffic performance measures with and without traffic congestion mitigation measures. The traffic performance measures provided in NetZone include average and longest delays, average and longest queue lengths, as well as the total delay in the network, before and during construction. Moreover, a friendly graphical userinterface makes NetZone easy to learn and use, and a preliminary case study shows that one canuse it to study a reasonably large network in a fraction of time that a micro-simulation package takes for the same network.

The developed methods and tools can help better plan and operate construction activities on highways, and more effectively manage traffic to reduce travel delays, both are consistent with Caltrans’s goals of increasing productivity and safety.

conference paper

Detecting Data Spoofing in Connected Vehicle based Intelligent Traffic Signal Control using Infrastructure-Side Sensors and Traffic Invariants

2023 IEEE Intelligent Vehicles Symposium (IV)

Publication Date

June 1, 2023

Author(s)

Junjie Shen, Ziwen Wan, Yunpeng Luo, Yiheng Feng, Z. Morley Mao, Qi Alfred Chen

Abstract

Connected Vehicle (CV) technologies are under rapid deployment across the globe and will soon reshape our transportation systems, bringing benefits to mobility, safety, environment, etc. Meanwhile, such technologies also attract attention from cyberattacks. Recent work shows that CV-based Intelligent Traffic Signal Control Systems are vulnerable to data spoofing attacks, which can cause severe congestion effects in intersections. In this work, we explore a general detection strategy for infrastructure-side CV applications by estimating the trustworthiness of CVs based on readily-available infrastructure-side sensors. We implement our detector for the CV-based traffic signal control and evaluate it against two representative congestion attacks. Our evaluation in the industrial-grade traffic simulator shows that the detector can detect attacks with at least 95% true positive rates while keeping false positive rate below 7% and is robust to sensor noises.

Suggested Citation
Junjie Shen, Ziwen Wan, Yunpeng Luo, Yiheng Feng, Z. Morley Mao and Qi Alfred Chen (2023) “Detecting Data Spoofing in Connected Vehicle based Intelligent Traffic Signal Control using Infrastructure-Side Sensors and Traffic Invariants”, in 2023 IEEE Intelligent Vehicles Symposium (IV). 2023 IEEE Intelligent Vehicles Symposium (IV), pp. 1–8. Available at: 10.1109/IV55152.2023.10186689.

published journal article

Mitigating climate change through transportation and land use policy: Opportunities and challenges

Environmental Law Reporter

Publication Date

January 1, 2019

Author(s)

Alejandro E. Camacho, Melissa L. Kelly, Nicholas Marantz, Gabriel Weil
Suggested Citation
Alejandro E. Camacho, Melissa L. Kelly, Nicholas J. Marantz and Gabriel Weil (2019) “Mitigating climate change through transportation and land use policy: Opportunities and challenges”, Environmental Law Reporter, 49(5), pp. 10473–10492. Available at: https://www.elr.info/articles/elr-articles/mitigating-climate-change-through-transportation-and-land-use-policy.

working paper

Bibliography on Transit Operator Stress and Absenteeism, Workers' Compensation and Extraboards

Publication Date

March 1, 1983

Author(s)

Working Paper

UCI-ITS-WP-83-3

Areas of Expertise

Abstract

This bibliography was prepared as supporting documentation for Project I/BTH-Bl-002 (ITS) conducted by the Institute of Transportation Studies, University of California, Irvine, under the sponsorship of the State of California’s Business, Transportation and Housing Agency. This project reviewed three facets of human resource productivity in public transit: workers’ compensation costs, extraboard scheduling and operator stress. These seemingly disparate topics share a common attribute: they each have been associated with the costs of absenteeism in the transit industry. Management concerns about abuses of workers’ compensation have led them to regard this program as a significant incentive for absenteeism. Extraboards, in contrast, have helped to insure schedule reliability by providing a ready pool of labor to replace absent employees. 1 The phenomenon of operator stress has occupied a middle ground, viewed by some as a cause of workers’ compensation claims, and by others as a result of traditional scheduling practices, such as the extraboard. This bibliography reviews over 50 international studies which have addressed the interrelated issues of absenteeism, workers’ compensation, extraboard scheduling and stress-related illness in the transit industry. Section I provides bibliographic information and summary abstracts of each of these studies. Section II describes two recently initiated U.S. research projects which are exploring transit operator stress, hypertension, and operator performance for the U.S. Department of Transportation and the National Academy of Science’s Transportation Research Board. Section Ill, prepared by project assistants Susan Lesh and Marianne Miasnik, lists a number of general studies of workers’ compensation reviewed as background to our current study.

Suggested Citation
Lyn Long and James L. Perry (1983) Bibliography on Transit Operator Stress and Absenteeism, Workers' Compensation and Extraboards. Working Paper UCI-ITS-WP-83-3. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/46m1j1x1.

MS Thesis

A Case Study of Transportation Behavior and Analysis at UC Irvine

Publication Date

March 30, 2013

Author(s)

Abstract

The purpose of this study is to provide a comprehensive analysis of UC Irvine affiliate transportation patterns and behavior. Through this analysis, recommendations on how to best promote more sustainable transportation on the UC Irvine campus was made to the two study sponsors, UCI Transportation and Distribution Services (TDS) and Anteater Express. With the assistance of TDS, an online survey was sent through a campus-wide email, and achieved overall sample size n = 2,034. Due to technical errors, freshmen did not receive the email. However, through the assistance of UCI Student Housing, surveys were sent to on-campus freshmen. Consequently, this still left out the off-campus freshmen and this exclusion impacted our analysis. Set aside from this limitation, the current study provided a framework, to the study sponsors, for an unprecedented comprehensive campus-wide transportation analysis at UC Irvine based on the study sponsor’s goals and objectives. Results indicate there is room for improving the use of alternative transportation for UCI affiliates who live within the City of Irvine in which UC Irvine is located. One recommendation pertains to increasing awareness of more sustainable transportation option and shedding light on transportation impacts early on such as during incoming student orientation and when students move out of the dorms and into local rental communities. That way when new UCI affiliates attempt to get acclimated to their new surroundings, with the early information, they can get the idea to explore alternative transportation as a potential way to be included within their daily life.

Suggested Citation
Chad Kim (2013) A Case Study of Transportation Behavior and Analysis at UC Irvine. MS Thesis. UC Irvine. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/17uq3m8/alma991033451549704701.

working paper

A Microsimulation of Daily Activity Patterns

Publication Date

December 1, 2000

Working Paper

UCI-ITS-WP-00-7, UCI-ITS-AS-WP-00-7

Areas of Expertise

Abstract

This paper documents the prototype development, application, and validation of a pattern synthesis model based on activity-travel pattern classifications. The technique proposed is a microsimulation approach to construct daily activity patterns for individuals established on empirical distributions of representative activity patterns and distributions of additional travel characteristics contained by every pattern. The method clearly recognizes the complex, stochastic nature of activity-travel behavior in terms of activity generation, spatial choice, and scheduling components. A successful application of the model is outlined using data from the 1994 Portland Activity Travel Survey.

Suggested Citation
Anup A. Kulkarni and Michael G. McNally (2000) A Microsimulation of Daily Activity Patterns. Working Paper UCI-ITS-WP-00-7, UCI-ITS-AS-WP-00-7. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/5xk3r012.

published journal article

Design and analysis of battery-aware automotive climate control for electric vehicles

ACM Trans. Embed. Comput. Syst.

Publication Date

August 1, 2018

Author(s)

Korosh Vatanparvar, Mohammad Al Faruque

Abstract

Electric Vehicles (EV) as a zero-emission means of transportation encounter challenges in battery design that cause a range anxieties for the drivers. Besides the electric motor, the Heating, Ventilation, and Air Conditioning (HVAC) system is another major contributor to the power consumption that may influence the EV battery lifetime and driving range. In the state-of-the-art methodologies for battery management systems, the battery performance is monitored and improved. While in the automotive climate control, the passenger’s thermal comfort is the main objective. Hence, the influence of the HVAC power on the battery behavior for the purpose of jointly optimized battery management and climate control has not been considered. In this article, we propose an automotive climate control methodology that is aware of the battery behavior and performance, while maintaining the passenger’s thermal comfort. In our methodology, battery parameters and cabin temperature are modeled and estimated, and the HVAC utilization is optimized and adjusted with respect to the electric motor and HVAC power requests. Therefore, the battery stress reduces, while the cabin temperature is maintained by predicting and optimizing the system states in the near-future. We have implemented our methodology and compared its performance to the state-of-the-art in terms of battery lifetime improvement and energy consumption reduction. We have also conducted experiments and analyses to explore multiple control window sizes, drive profiles, ambient temperatures, and modeling error rates in the methodology. It is shown that our battery-aware climate control can extend the battery lifetime by up to 13.2% and reduce the energy consumption by up to 14.4%.

Suggested Citation
Korosh Vatanparvar and Mohammad Abdullah Al Faruque (2018) “Design and analysis of battery-aware automotive climate control for electric vehicles”, ACM Trans. Embed. Comput. Syst., 17(4), pp. 1–22. Available at: 10.1145/3203408.

conference paper

Towards secure and safe appified automated vehicles

2017 IEEE intelligent vehicles symposium (IV)

Publication Date

June 1, 2017

Author(s)

Yunhan Jack Jia, Ding Zhao, Qi Alfred Chen, Z. Morley Mao
Suggested Citation
Yunhan Jack Jia, Ding Zhao, Qi Alfred Chen and Z. Morley Mao (2017) “Towards secure and safe appified automated vehicles”, in 2017 IEEE intelligent vehicles symposium (IV). IEEE, pp. 705–711. Available at: 10.1109/ivs.2017.7995800.

published journal article

Issues and problems of moving goods in urban areas

Journal of Transportation Engineering

Publication Date

January 1, 1989

Author(s)

Suggested Citation
Stephen G Ritchie (1989) “Issues and problems of moving goods in urban areas”, Journal of Transportation Engineering, 115(1), pp. 4–19. Available at: 10.1061/(asce)0733-947x(1989)115:1(4).

conference paper

Comparative Total Cost of Ownership (TCO) Analysis for Off-Road Equipment Electrification Incentive Requirement in Near Future

Transportation Research Board 2024 Annual Meeting

Publication Date

January 10, 2024

Author(s)

Fuad Un-noor, Bo Liu, Blake Lane, Craig Rindt, Kanok Booriboonsomsin
Suggested Citation
Fuad Un-noor, Bo Liu, Blake Lane, Craig Rindt and Kanok Booriboonsomsin (2024) “Comparative Total Cost of Ownership (TCO) Analysis for Off-Road Equipment Electrification Incentive Requirement in Near Future”. Transportation Research Board 2024 Annual Meeting, Washington, DC.