published journal article

From state of the practice to state of the art: improving equity analysis in regional transportation plans

Transportation

Abstract

Metropolitan planning organizations (MPOs) in the United States develop long-range Regional transportation plans (RTPs), which are required in order for municipalities to receive federal funds for transportation projects. Title VI of the federal Civil Rights Act of 1964 requires MPOs to submit an equity analysis to demonstrate that their RTPs do not discriminate against protected groups. This paper (i) identifies and evaluates the current range of practices in transportation equity analysis in RTPs for the largest MPOs, and (ii) provides practical steps for MPOs to improve their equity analyses. To identify the range of practices, we assess how MPOs define equity goals, identify populations of concern, integrate their equity analysis into their RTP documents, use community input, and whether they meet or exceed legal standards. Additionally, we evaluate how MPOs use travel forecasting models in their equity analyses and the quality of their models; we also describe practical steps for MPOs to improve their equity analyses along this dimension. We find significant variability in how MPOs define fairness in their equity goals, define populations of concern, use community input, and use travel forecasting models in their equity analyses. For example, several MPOs conduct in-depth equity analyses using advanced travel forecasting models, synthetic populations of households, and various classifications of populations of concern. In contrast, other MPOs only display the locations of RTP projects on a map with geographies labeled as disadvantaged or non-disadvantaged. We also find that MPOs with more restrictive state requirements than federal guidelines produce higher quality equity analyses—an important finding considering the Biden Administration’s review of Executive Order 12898, a potential avenue to alter guidelines to improve MPO equity analyses.

Suggested Citation
Maxwell Cabello, Michael Hyland and Nicholas Marantz (2025) “From state of the practice to state of the art: improving equity analysis in regional transportation plans”, Transportation, 52(3), pp. 791–826. Available at: 10.1007/s11116-023-10439-4.

conference paper

Methodology for determining the best use of road management equipment (Case study: 18 regional offices in south korea)

Proceedings of the 92nd annual meeting of the transportation research board

Publication Date

January 1, 2013

Author(s)

Abstract

This paper presents a methodology for determining the best use of road fleet/equipment management. The main purpose of this research is to aid public agencies with road fleet/equipment management within a given budget. In order to demonstrate the value of this approach, a case study using data collected for eighteen regional offices of the South Korean Ministry of Land, Transport and Maritime Affairs were examined. These offices use a computerized system called KAMIS to monitor both the use and condition of road fleet/equipment systematically. This system records the operational history and monitors the current condition of road fleet/equipment management. Road agencies might also want to know whether they currently have sufficient fleet/equipment to handle their actual work, but KAMIS does not provide that type of information. Thus, a methodology uses operational records for road fleet/equipment management, and two evaluation indicators has been developed. Based on the results of the author methodology, fleet/equipment can be classified into several groups: 1) frequently used and important, 2) relatively less used and important, 3) barely used and low importance, and 4) frequently used and low importance. These data can be used by regional offices to effectively lend and borrow fleet/equipment for both long and short term use. Such measures will help save money for the purchase and maintenance of road fleet/equipment. While the study focuses on a specific case study, the decision analysis method can easily be applied by similar decision makers in other countries.

Suggested Citation
Choong Heon Yang, Amelia C. Regan and In Soo Kim (2013) “Methodology for determining the best use of road management equipment (Case study: 18 regional offices in south korea)”, in Proceedings of the 92nd annual meeting of the transportation research board, p. 17p.

conference paper

Vision-based two-factor authentication & localization scheme for autonomous vehicles

Third International Workshop on Automotive and Autonomous Vehicle Security (AutoSec) 2021 (part of NDSS)

Publication Date

January 1, 2021

Author(s)

Anas Alsoliman, Marco Levorato, Qi Alfred Chen
Suggested Citation
Anas Alsoliman, Marco Levorato and A. Chen (2021) “Vision-based two-factor authentication & localization scheme for autonomous vehicles”, in Third International Workshop on Automotive and Autonomous Vehicle Security (AutoSec) 2021 (part of NDSS). Available at: https://par.nsf.gov/servlets/purl/10215804 (Accessed: October 11, 2023).

published journal article

A phase-reconstruction technique for low-power centimeter-accurate mobile positioning

IEEE Transactions on Signal Processing

Publication Date

May 1, 2014

Author(s)

K.M. Pesyna, Zaher Kassas, R.W. Heath Jr., T.E. Humphreys
Suggested Citation
K.M. Pesyna, Z.M. Kassas, R.W. Heath Jr. and T.E. Humphreys (2014) “A phase-reconstruction technique for low-power centimeter-accurate mobile positioning”, IEEE Transactions on Signal Processing, 62(10), pp. 2595–2610. Available at: 10.1109/tsp.2014.2311967.

Phd Dissertation

Predicting activity types from GPS and GIS data

Abstract

Current travel forecasting models have had limited sensitivity to policy decisions. One of the primary challenges with travel forecasting models (both experimental and those implemented) is limitations in the data. The primary data source, the daily travel diary, is limited in both accuracy and sample size. The daily travel diary has known problems with underreporting, time inaccuracies, respondent fatigue, and other human errors. Global positioning systems (GPS) have been recently used to supplement the daily travel diary. As GPS becomes more accurate, reliable, and cost effective, could it entirely replace the daily travel diary? A number of efforts have used GPS data for route choice studies and to supplement daily travel diaries by providing more accurate time data, and determining under-reporting rates. GPS is also used in computer assisted daily travel diaries, reminding respondents of activities they may have forgotten to report. GPS devices record times and locations of each activity and the trips between those activities. To use GPS data to replace the daily travel diary one need only predict the activity types. The goal of this research is to develop and test a model to predict activity types based solely on: (1) GPS data from devices placed on the individual’s vehicle or person, (2) Land use data, such as location type, expressed as GIS data, and (3) Demographic data for the individual and the household. This thesis summarizes models developed using discriminant analysis and classification/regression trees. The models predicted in which of 26 different activity types the individual participated. Accuracy for out of home activities for the best model was 63%. When combed with the activity of being at home (which can be accurately predicted if we know the individuals home location) an accuracy of 79% was achieved (72% if you consider that GPS data may miss as much as 10% of trips). Since travel diaries have been known to underreport trips by as much as 25%, GPS data with the model developed can be very competitive. It is even more appealing considering the time inaccuracies and human error associated with travel diaries.

Suggested Citation
Patrick Tracy McGowen (2006) Predicting activity types from GPS and GIS data. Ph.D.. University of California, Irvine. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/74dcdl/alma991035093161304701 (Accessed: October 14, 2023).

conference paper

NeuroNoC. neural network inspired runtime adaptation for an on-chip communication architecture

Proceedings of the eighth IEEE/ACM/IFIP international conference on Hardware/software codesign and system synthesis - CODES/ISSS '10

Publication Date

January 1, 2010

Author(s)

Thomas Ebi, Mohammad Al Faruque, J org Henkel
Suggested Citation
Thomas Ebi, Mohammad Abdullah Al Faruque and J org Henkel (2010) “NeuroNoC. neural network inspired runtime adaptation for an on-chip communication architecture”, in Proceedings of the eighth IEEE/ACM/IFIP international conference on Hardware/software codesign and system synthesis - CODES/ISSS '10. ACM Press, pp. 223–230. Available at: 10.1145/1878961.1879002.

published journal article

Comments on Gillette, “Voting with your hands: Direct democracy in annexation”

SOUTHERN CALIFORNIA LAW REVIEW

Publication Date

January 1, 2005

Author(s)

Suggested Citation
JK Brueckner (2005) “Comments on Gillette, “Voting with your hands: Direct democracy in annexation””, SOUTHERN CALIFORNIA LAW REVIEW, 78(4), pp. 869–875.

published journal article

Three-part tariffs with heterogeneous users: Monopoly and duopoly cases

Review of industrial organization

Publication Date

July 1, 2015

Author(s)

Ji Won Baek, Jan Brueckner

Abstract

Although two-part tariffs are widely studied, only three papers consider three-part tariffs, which consist of an access fee in return for an allowance consumption level along with a unit “overage” price for consumption beyond the allowance. Moreover, none of these papers addresses some elementary and fundamental questions concerning the optimal features of the tariff in the presence of heterogeneous users: (1) How does the overage price (and thus marginal benefit for a high-demand user) compare to the marginal cost of the service? (2) How does marginal benefit compare to marginal cost for a low-demand user consuming at the allowance level? (3) How large is the access fee relative to benefits from the service? The purpose of this paper is to answer these questions by using a simple model with two types of consumers and a constant marginal cost. The analysis is carried out for a monopoly provider and then for the duopoly case, with the outcomes under the two market structures compared.

Suggested Citation
Ji Won Baek and Jan K. Brueckner (2015) “Three-part tariffs with heterogeneous users: Monopoly and duopoly cases”, Review of industrial organization, 47(2), pp. 155–165. Available at: 10.1007/s11151-015-9471-2.

working paper

On Activity-based Network Design Problems

Publication Date

September 5, 2012

Working Paper

UCI-ITS-WP-12-3

Areas of Expertise

Abstract

This paper examines network design where OD demand is not known a priori, but is the subject of responses in household or user itinerary choices that depend on subject infrastructure improvements. Using simple examples, we show that falsely assuming that household itineraries are not elastic can result in a lack in understanding of certain phenomena; e.g., increasing traffic even without increasing economic activity due to relaxing of space-time prism constraints, or worsening of utility despite infrastructure investments in cases where household objectives may conflict. An activity-based network design problem is proposed using the location routing problem (LRP) as inspiration. The bilevel formulation includes an upper level network design and shortest path problem while the lower level includes a set of disaggregate household itinerary optimization problems, posed as household activity pattern problem (HAPP) (or in the case with location choice, as generalized HAPP) models. As a bilevel problem with an NP-hard lower level problem, there is no algorithm for solving the model exactly. Simple numerical examples show optimality gaps of as much as 5% for a decomposition heuristic algorithm derived from the LRP. A large numerical case study based on Southern California data and setting suggest that even if infrastructure investments do not result in major changes in itineraries the results provide much higher resolution information to a decision-maker. Whereas a conventional model would output the best set of links to invest given an assumed OD matrix, the proposed model can output the same best set of links, the same OD matrix, and a detailed temporal distribution of activity participation and travel, given a set of desired destinations and schedules.

Suggested Citation
Jee Eun Kang, Joseph Y.J. Chow and Will W. Recker (2012) On Activity-based Network Design Problems. Working Paper UCI-ITS-WP-12-3. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/8g615878.

conference paper

Performance characterization and call reliability diagnosis support for voice over LTE

Proceedings of the 21st annual international conference on mobile computing and networking - MobiCom '15

Publication Date

January 1, 2015

Author(s)

Yunhan Jack Jia, Qi Alfred Chen, Zhuoqing Morley Mao, Jie Hui, Kranthi Sontinei, Alex Yoon, Samson Kwong, Kevin Lau
Suggested Citation
Yunhan Jack Jia, Qi Alfred Chen, Zhuoqing Morley Mao, Jie Hui, Kranthi Sontinei, Alex Yoon, Samson Kwong and Kevin Lau (2015) “Performance characterization and call reliability diagnosis support for voice over LTE”, in Proceedings of the 21st annual international conference on mobile computing and networking - MobiCom '15. ACM Press, pp. 452–463. Available at: 10.1145/2789168.2790095.