MS Thesis

An Investigation of Factors Influencing Route Choice of Bicyclists

Abstract

The growing number of people commuting and making trips by bicycle and the associated health and environmental benefits of this trend has captured the attention of transportation engineers and planners in recent years. However, a review of the current literature reveals a limited understanding of travel behavior of bicyclists, in particular bicyclists’ route choice behavior. This study investigates factors influencing bicyclists’ route choice and examines their willingness to deviate from the shortest route. Intercept surveying techniques were coupled with a self-administered web-based surveying tool to collect mapped routes of bicyclists. The data were used to (1) perform multinomial logit (MNL) model estimations and (2) evaluate deviation ratios. The MNL model estimations suggested that factors such as exposure to vehicle traffic, number of signalized intersections, and overall safety were statistically significant with coefficient signs as expected. Travel time was found to be marginally significant with a coefficient sign as expected. The deviation ratio analysis found that in general bicyclists were willing to deviate 27% (1.27); persons in the 45 to 54 years of age category had the highest deviation ratio (1.45); males and females had the same deviation ratio (1.27); “very confident” bicyclists were willing to deviate 12% farther than “fairly confident” bicyclists; persons traveling more than 9 miles tended to have a higher deviation ratio; and work-based-trips had an 18% higher deviation ratio than non-work-based trips. The combine results suggest that bicyclists are willing to deviate considerably for a safe route with low exposure to vehicle traffic and signalized intersections.

Suggested Citation
DAVID WILLIAM NYENHUIS (2012) An Investigation of Factors Influencing Route Choice of Bicyclists. MS Thesis. UC Irvine. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/u4evf/cdi_proquest_journals_1024432003.

working paper

The Determinants of Growth of Employment Subcenters

Publication Date

January 1, 1999

Associated Project

Abstract

This paper presents an empirical analysis of subcenter growth. We develop a series of hypotheses based on the theoretical concepts that have been proposed as explanations for the emergence and growth of subcenters. We then conduct tests of these hypotheses using 1970-80 data from the Los Angeles region. We find that subcenters containing fast-growing industries tended to grow rapidly, and so did those close to airports. There is weak evidence that large subcenters and those located near downtown Los Angeles grew more slowly in proportional terms, possibly indicating diseconomies of scale due to congestion.

published journal article

Workings of the melting pot: Social networks and the evolution of population attributes

JOURNAL OF REGIONAL SCIENCE

Publication Date

January 1, 2007

Author(s)

Jan Brueckner, Oleg Smirnov

Abstract

This paper links the two nascent economic literatures on social networks and cultural assimilation by investigating the evolution of population attributes in a simple model where agents are influenced by their acquaintances. The main conclusion of the analysis is that attributes converge to a melting-pot equilibrium, where everyone is identical, provided the social network exhibits a sufficient degree of interconnectedness. When the model is extended to allow an expanding acquaintance set, convergence is guaranteed provided a weaker interconnectedness condition is satisfied, and convergence is rapid. If the intensity of interactions with acquaintances becomes endogenous, convergence (when it occurs) is slowed when agents prefer to interact with people like themselves and hastened when interaction with dissimilar agents is preferred.

Suggested Citation
Jan K. Brueckner and Oleg Smirnov (2007) “Workings of the melting pot: Social networks and the evolution of population attributes”, JOURNAL OF REGIONAL SCIENCE, 47(2), pp. 209–228. Available at: 10.1111/j.1467-9787.2007.00506.x.

research report

Co-Location of Light-Duty and Heavy-Duty Zero-Emission Vehicle Infrastructure to Promote a Resilient Fueling Network in California

Publication Date

April 1, 2026

Author(s)

Abstract

This study examines whether co-locating stations for light-duty zero emission vehicles (ZEVs) with stations for heavy-duty ZEVs would increase network coverage and improve resiliency to help California achieve its targets for widespread ZEV adoption. The study separately models of siting light-and heavy-duty at the same locations vs. separate locations for (i) electric charging stations and (ii) hydrogen refueling stations. The results indicate electric charging stations in California are being used at only 13% of total capacity. Building out and optimizing the locations of light-duty electric vehicle stations will results in greater demand met and resiliency than will co-locating these at heavy-duty charging stations. On the other hand, co-location of hydrogen refueling stations for light duty vehicles at sites for heavy-duty vehicle stations may increase demand met, network resiliency, and adoption rates of light-and heavy-duty fuel cell electric vehicles. These adoption rates are constrained by the current infrastructure.

Phd Dissertation

Citizens near the path of least resistance: Travel behavior of Century Freeway corridor residents

Publication Date

June 30, 1995

Associated Project

Abstract

This work joins a body of literature that tests whether commuting data support: (a) a hypothesized mismatch between employment or shopping opportunities among isolated groups of urban residents; and (b) the equitable distribution of mobility benefits following the opening of a major urban freeway. A history of the urban interstate system and the legislation guiding its construction is provided first as a background to the study. Second, a social ecological interpretation of the multi-dimensional effects of a change in urban form is introduced with a specific orientation toward freeway sitings. New highway impacts vary depending upon the condition of the surrounding area and proximity to the facility. Three grouping variables are introduced as possible means through which to categorize residents severely impacted by the construction of the Glenn M. Anderson (Century) Freeway/Transitway (Interstate 105). A behavioral measure segments residents based on the social and economic conditions in their census tracts. Two geographic grouping variables separate inner city residents from more suburban residents and residents close to the right-of-way from those more than a mile from the construction. U.S. Census data illustrate the social and economic differences among these groups within the Century Freeway corridor area. It is determined that, at an aggregate level, mean travel time to work is longer for residents of distressed areas, central city areas and residents near the right of way. Residents in the study area are surveyed at two points in time. Baseline travel behavior analyses indicate that controlling for race, education, income, and mode choice, the work trip of South Central Los Angeles residents is longer than neighboring areas in the corridor. Also, this trip is longer for residents living within one mile of the freeway. The behavioral variable does not aid in the discrimination of work trip travel times. Analysis of transportation behavior subsequent to the freeway opening reveals that the travel time savings for work and nonwork trips are unequally distributed across the study area. Significantly, the freeway opening is not associated with a convergence of work trip travel times. Those least affected by highway construction demonstrate travel benefits that are not found among severely impacted respondents.

Suggested Citation
Drusilla Ruth van Hengel (1995) Citizens near the path of least resistance: Travel behavior of Century Freeway corridor residents. PhD Dissertation. UC Irvine. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/17uq3m8/alma991035093317604701.

working paper

A Procedure for the Assessment of Traffic Impacts During Freeway Reconstruction

Publication Date

August 1, 1986

Working Paper

UCI-ITS-WP-86-7

Areas of Expertise

Abstract

This paper reports the results of an effort directed toward developing a consistent methodology to assess the impacts of traffic disruption due to major transportation reconstruction/rehabilitation projects during the period of implementation. In the approach taken by this research, state-of-the-art traffic simulation models are used to estimate the performance of the transportation system during various construction phases. Alternative construction and traffic redirection strategies designed to minimize both the direct and indirect losses associated with the construction/rehabilitation are then evaluated with the  development of a systematic, computerized procedure designed to: 1. provide for the creation and comparison of multiple and ‘layered’ reconstruction/rehabilitation scenarios,2. minimize the required knowledge of both the detailed interactions with the model as well as the host computer, and 3. produce meaningful, comparative outputs that assist in the selection of reasonable alternatives. The resulting modeling environment is viewed as a convenient tool to assist both the traffic engineer and the transportation planner in selection of reasonable reconstruction/rehabilitation plans and schedules. 

Suggested Citation
John D. Leonard and Will Recker (1986) A Procedure for the Assessment of Traffic Impacts During Freeway Reconstruction. Working Paper UCI-ITS-WP-86-7. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/5bm155r5.

conference paper

Impact of Flight Trajectory Design on Performance and Noise for AAM Aircraft

AIAA AVIATION FORUM AND ASCEND 2024

Publication Date

July 29, 2024

Author(s)

Victoria R. Pellerito, Nathan H. Yeung, Jacqueline (Jacquie) Huynh, R. John Hansman
Suggested Citation
Victoria R. Pellerito, Nathan H. Yeung, Jacqueline L. Huynh and R. John Hansman (2024) “Impact of Flight Trajectory Design on Performance and Noise for AAM Aircraft”, in AIAA AVIATION FORUM AND ASCEND 2024. AIAA AVIATION FORUM AND ASCEND 2024, Las Vegas, Nevada: American Institute of Aeronautics and Astronautics. Available at: 10.2514/6.2024-4076.

published journal article

The role of accessibility in basic transportation choice behavior

Transportation

Publication Date

June 1, 1976

Author(s)

Lawrence D. Burns, Thomas Golob
Suggested Citation
Lawrence D. Burns and Thomas F. Golob (1976) “The role of accessibility in basic transportation choice behavior”, Transportation, 5(2), pp. 175–198. Available at: 10.1007/BF00167272.

Phd Dissertation

Incorporating Individual Activity Arrival and Duration Preferences within a Time-of-day Travel Disutility Formulation of the Household Activity Pattern Problem (HAPP)

Publication Date

January 1, 2014

Author(s)

Abstract

This dissertation provides modifications and extensions to the Household Activity Pattern Problem (HAPP) to help move existing formulations from a laboratory prototype toward a more useable activity-based demand modeling product. Previous research on HAPP has been based on a pickup and delivery problem with time window constraints (PDPTW), which does not lend itself easily to application that is compatible with an activity-based forecasting model. Meanwhile, other research on activity-based modeling lacks of the integration of household decisions regarding time-of-day arrival, activity duration and traffic congestion effects on travel. We borrow concepts from economic research and consider that each household member tries to obtain maximum utility by choosing arrival time of activities, choosing activity duration while minimizing travel times and travel costs throughout the course of the day.

Suggested Citation
Daji Yuan (2014) Incorporating Individual Activity Arrival and Duration Preferences within a Time-of-day Travel Disutility Formulation of the Household Activity Pattern Problem (HAPP). UC Irvine. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/1gpb62p/alma991002869219704701 (Accessed: October 12, 2023).

working paper

A Comparison of Time-use for Telecommuters, Potential Telecommuters, and Commuters during the COVID-19 Pandemic

Abstract

Throughout the ongoing COVID-19 pandemic, changes in daily activity-travel routines and time-use behavior, including the widespread adoption of telecommuting, have been manifold. This study considers how telecommuters have responded to the changes in activity-travel scheduling and time allocation. In particular, we consider how workers utilized time during the pandemic by comparing workers who telecommuted with workers who continued to commute. Commuters were segmented into those who worked in telecommutable jobs (potential telecommuters) and those who did not (commuters). Our empirical analysis suggested that telecommuters exhibited distinct activity participation and time use patterns from the commuter groups. It also supported the basic hypothesis that telecommuters were more engaged with in-home versus out-of-home activity compared to potential telecommuters and commuters. In terms of activity time-use, telecommuters spent less time on work activity but more time on caring for household members, household chores, eating, socializing and recreation activities than their counterparts. During weekdays, a majority of telecommuters did not travel and in general this group made fewer trips per day compared to the other two groups. Compared to telecommuters, potential telecommuters made more trips on both weekdays and weekends while non-telecommutable workers made more trips only on weekdays. The findings of this study provide initial insights on time-use and the associated activity-travel behavior of both telecommuter and commuter groups during the pandemic.

Suggested Citation
Rezwana Rafiq and Michael McNally (2024) A Comparison of Time-use for Telecommuters, Potential Telecommuters, and Commuters during the COVID-19 Pandemic. Working Paper. ITS-Irvine. Available at: https://escholarship.org/uc/item/3k6453wg.