Economic Structure, Community Development, and Transportation Systems: An Empirical Analysis of Household Activity Patterns

Status

Complete

Project Timeline

July 1, 1979 - September 30, 1980

Principal Investigator

Department(s)

Civil and Environmental Engineering

Project Summary

This study is designed to empirically evaluate household acivity patterns in order to assess the impacts of transportation systems and services available on both economic structure community development in a multi-county region. The theory of travel behavior implicit in this approach relates household activity patterns (i.e., a collection of activities) directly to site locations and specific economic activities in the environment. The rationale for this approach is that by knowing how people respond to travel choice situations (i.e., how individuals sequence activities and allocate time-a physical space/time dimension of travel), the transportation researcher will be in a position to describe land-use and land-use change on the basis how the environment is used. The study group is using an existing large scale data base collected by the California Department of Transportation and the Southern California Association of Governments in 1976 that contains information about rural as well as urban travel behavior. Results of the in investigation are expected to provide useful information on the impacts of transportation systems and services available, and associated spatial, economic, and social patterns on various aspects of community development and investment decisions.

Accessibility, Travel Behavior, and New Urbanism: Comparative Study of Mixed Use Centers and Auto-Oriented Corridors in the South Bay (Los Angeles) Region

Status

Complete

Project Timeline

January 1, 2008 - July 31, 2008

Principal Investigator

Project Team

Project Summary

This dissertation is an empirical study of land use and travel behavior comparing sixteen mixed-use centers and auto-oriented corridors in the South Bay region of Los Angeles County, based on individual travel data collected from the 2005 South Bay Travel Survey. The first part of my dissertation tests the New Urbanist claim that neotraditional urban design promotes more walking trips and discourages automobile trips by regressing individual automobile and walking trips on a vector of sociodemographic and attitudinal variables for mixed-use centers and auto-oriented corridors in the South Bay area. Instrumental variable regressions are also used to control for residential location choice and self-selection bias. The results suggest that individuals residing in mixed-use centers tend to take more walking trips than those residing in auto-oriented corridors while individuals residing in mixed-use centers tend to drive equally as much as individuals residing in auto-oriented corridors. The second part of my dissertation compares individual automobile and walking trips for the South Bay study areas by race and ethnicity and analyzes the interaction between race/ethnicity and ethnic change on driving and walking behavior. The results suggest that African-Americans are less likely to drive and Asians are less likely to walk compared to other racial/ethnic groups; additionally, significant interaction between race/ethnicity and ethnic change were reported for Latinos.

policy brief

Advancing Community-Identified Strategies to Transform Roadways in California’s San Joaquin Valley

Abstract

Disparities in exposure to roadway hazards (e.g., pollution, noise) remain stubbornly persistent due to structural inequalities embedded in the built environment. Research has consistently documented racial/ethnic and socioeconomic disparities in traffic exposures nationwide, including heightened exposure to heavy-duty truck traffic, a significant source of noise and pollution. Such disparities also exist in the provision of sidewalks, bike lanes, and street trees, which can help mitigate roadway dust, noise, and pollution and can increase pedestrian safety, encourage walking and cycling, and provide health benefits.

This publication describes how the research team evaluated opportunities and barriers to using a community steering committee process approach to advance environmental justice and transportation equity. Through interviews and case study analysis, the team examined the role community leaders played in the prioritization and implementation of three community-identified strategies that mitigate roadway hazards in three AB 617 communities in California’s San Joaquin Valley – Stockton, South Central Fresno, and Arvin/Lamont. These strategies include (1) vegetative barriers between roadways and sensitive land uses; (2) expanded sidewalk infrastructure; and (3) revised heavy duty truck route designations.

research report

Between the Forest and the Trees: Community Strategies to Transform Roadways in California’s San Joaquin Valley

Abstract

Expanding participation of historically disenfranchised groups within decision-making processes is an important strategy to increase equity within transportation planning but traditional engagement practices (e.g., public meetings, focus groups) have historically done little to address the needs of disadvantaged communities. This study evaluates the opportunities and barriers to using a community steering committee participation model within transportation planning to advance equity and environmental justice. It utilizes interview and case study analysis to examine the experiences of residents and community leaders in prioritizing community-identified strategies to mitigate roadway hazards in three AB 617 communities in California’s San Joaquin Valley – Stockton, South Central Fresno, and Arvin/Lamont. It investigates the role resident and CBO members played in the prioritization, approval, and implementation of three strategies to transform roadways and mitigate air pollution, noise, dust, and safety hazards: (1) new vegetative barriers between major roadways and sensitive land uses; (2) expanded sidewalk infrastructure; and (3) revised heavy-duty truck route designations. Findings demonstrate that “meaningful involvement” for impacted communities within transportation planning will require officials, residents, and organizations to commit to an ongoing process of experimentation and learning about the most effective approaches for advancing transportation equity and environmental justice.

The Personal Travel Assistant (PTA): Measuring the Dynamics of Human Travel Behavior

Status

Complete

Project Timeline

September 1, 2007 - July 31, 2009

Principal Investigator

Department(s)

Civil and Environmental Engineering, Information and Computer Science

Transportation and the Environment: Essays on Technology, Infrastructure, and Policy

Status

Complete

Project Timeline

April 1, 2008 - July 31, 2009

Principal Investigator

Project Team

Project Summary

As emissions from millions of vehicles increase substantially every year, air quality is currently a major problem in California and it seems increasingly difficult to find effective solutions.  These three independent yet related projects attempt to propose possible solutions to deal with California’s air pollution problem.  The first project will evaluate and analyze the increasing interest for hybrid cars in California by quantifying the short term impacts of concerns for air pollution, energy efficiency policies, allowing single-occupant hybrid vehicle to use high-occupancy vehicle  (HOV) lanes in terms of availability, and long term impacts for air pollution and global warming.  The second project attempts to analyze social and environmental impacts of pollution from freight train traffic from/to Southern California ports through Alameda Corridor.  
 The final project revises the work by Giuliano, Hwang and Wachs on the performance of Employee Trip Reduction Program (Rule 2202) in Southern California.  This project will review, evaluate, and analyze the program with is part of Transportation Demand Management (TDM) for improving air quality and traffic congestion and making policy recommendations.

Phd Dissertation

Sacred placemaking and urban policy the case of Tepoztlán, Mexico

Publication Date

June 30, 2020

Author(s)

Abstract

Sacred places – ranging from religious to secular structures, human created or natural areas, or places with ritual, symbolic, or cultural significance – are rarely addressed by urban planners but are sources of great meaning for many communities. One reason for this neglect is the inherent difficulty in measuring the value and meaning of place for different individuals or groups. This research focused on this challenge by using ethnographic field research methods to gain an in-depth understanding of how people view and interact with sacred places in their community. The case study site of Tepoztlán is an urbanizing pueblo in central Mexico where sacred places play a significant role in daily life, rituals, and festivals and urban forms facilitate these interactions. I asked how sacred meaning was ascribed to places in Tepoztlán, how the built environment impacted behavior around these spaces, how communities preserved sacred places, and the impacts of urbanization on preservation efforts. Findings derived from 53 interviews and three months of field observations revealed five themes characteristic of sacred placemaking in Tepoztlán, including intricate patterns of neighborhood exchange, intergenerational beliefs in sacred mountains, collectivism, pedestrian oriented design, and community involvement in construction of the built environment. Indigenous placemaking is then contrasted with two top-down urban development policies that changed the character of the town and threatened sacred places and placemaking. A tourism program called Pueblos Mágicos [Magical Towns] and expansion of the Pera-Cuautla freeway have degraded and commodified sacred sites and perpetuated unequal distribution of development benefits. The research discusses how employing different views of people-environment interactions beyond dominant Western views can help planners to better understand and plan for preservation of meaningful spaces and in turn preserve and enhance community identity, culture, and self-sufficiency.