Aaron Golub

City CarShare: Longer-Term Travel Demand and Car Ownership Impacts

Four years after the introduction of City CarShare in the San Francisco, Bay area in California, 29% of carshare members had gotten rid of one or more cars, and 4.8% of members’ trips and 5.4% of their vehicle miles traveled were in carshare vehicles. Matched-pair comparisons with a statistical control group suggest that, over time, members have reduced total vehicular travel. However, most declines occurred during the first 1 to 2 years of the program; 3 to 4 years after City CarShares inauguration, earlier declines had leveled off. Because many carshare vehicles are small and fuel-efficient but can carry several people, the trend in per capita gasoline consumption also is downward. Mindful of the cumulative costs of driving, carshare members appear to have become more judicious and selective when deciding whether to drive, take public transit, walk, bike, or even forgo a trip. Coupled with reduced personal car ownership, these factors have given rise to a resourceful form of automobility in the San Francisco Bay area.

Spatial and Temporal Capitalization Effects of Light Rail in Phoenix From Conception, Planning, and Construction to Operation

Studies have shown that proximity to light rail transit (LRT) stations positively affects property values and that these effects can appear before a system opens for operation. Here, we expand on these questions. We explore capitalization effects at several stages during the planning process for four real estate markets: single-family homes, homes in multifamily structures, commercial properties, and vacant land, using the case study of the LRT system in Phoenix, Arizona. We confirm earlier results concerning the value of proximity, and also find that markets exhibit value increases at different stages during the planning and construction process.

Analyzing equity impacts of transit fare changes: Case study of Alameda–Contra Costa Transit, California

Many public transit agencies consider increasing fares when faced with budget shortfalls. This paper analyzes the Alameda-Contra Costa (AC) Transit Districts five alternative fare proposals introduced for public discussion in March 2005. The proposals combined fare hikes, base fare reductions, eliminations of free transfers, and discontinuation of periodic passes. Using the agencys 2002 on-board survey data, the study assessed the impacts of individual fare proposals on different subsets of riders and evaluated if they were equitable; and estimated potential fare revenues, using alternative price elasticities to estimate changes in ridership due to changes in price. The analysis revealed that proposals that increased the cost of transfers or eliminated unlimited-use passes produced dramatically unequal impacts on certain riders. Proposals for flat fares per ride were found to be least equitable, even when the base fare was lowered, because lower income riders, youth, and minorities made more trips and transferred more frequently than their more affluent counterparts. Proposals that maintained existing pass instruments and allowed transfers for small fees were the most favorable. The paper demonstrates the utility of on-board surveys and details an approach that could be widely used for evaluation of equity in public transit and other areas.

Race, Space, and Struggles for Mobility: Transportation Impacts on African Americans in Oakland and the East Bay

Abstract A long history of overt discrimination left an enduring racialized imprint upon the geography of the East Bay. While the benefits of a metropolitan decentralization of jobs, housing, and public investment fell to Whites, discrimination in employment and housing trapped African Americans in urban neighborhoods burdened by infrastructure encroachment and divestment. By circa 1970, overt discrimination succumbed to new, racially neutral, legal, and administrative forms, including regional planning processes. Using an environmental racism framework, we show that these new forms reproduced the existing racialized geography by means of new inequalities in representation and transportation service provision. These new regional transportation policies, like those challenged by a 2005 civil rights lawsuit, favored the mobility needs of more affluent suburbanites over those of African American East Bay bus riders. These policies, layered onto an existing racialized geography, reinforced existing inequalities by failing to address racial barriers to opportunity in the built environment. [Key words: transportation, race, segregation, Oakland]

Using a “Sustainable Solution Space” Approach to Develop a Vision of Sustainable Accessibility in a Low-Income Community in Phoenix, Arizona

ABSTRACT The sustainability challenges posed by Americas automobile-based transport system demand a transition toward more accessible urban areas. Accessibility planning at the neighborhood scale involves improving both non-automobile mobility and the range of services offered within a community. Reflecting the complex system dynamics influencing neighborhood travel behavior and the context of local access needs, we employ the Sustainability Solution Space (SSP) method to envision a sustainable state of transportation accessibility for the Sky Harbor neighborhood of central Phoenix, Arizona. This case study explores the suitability of the SSP methodology for sustainable visioning exercises, recommending its use for participatory transportation planning studies.

Mitigating urban sprawl effects: a collaborative tree and shade intervention in Phoenix, Arizona, USA

Communities in Phoenix are confronted with numerous challenges that adversely affect human health and safety, with disproportionate impacts on low-income communities. While some challenges are being addressed at the city level, new alliances at the neighbourhood level are initiating community development programmes and projects. This article reports on an intervention study carried out in collaboration with community representatives, city staff, and non-profit organisations to mitigate adverse effects of urban sprawl in the Sky Harbour Neighbourhood in Phoenix. Participatory research was conducted to design and test a tree and shade intervention. Challenges associated with navigating community desires and broader principles of sustainable development are discussed. The study offers a replicable and adaptable intervention research design aimed at empowering communities to meet urban challenges.

Sustainability and intergenerational equity: do past injustices matter?

Intergenerational equity is a core concept of sustainability, typically expressed as a concern for future generations. We contend in this review paper that intergenerational equity can also reflect a concern for past generations. Within the study and practice of social justice, significant concern is paid to remedying injustices suffered by past generations, sometimes called “restorative justice,” because these injustices do not end with the past, but remain embedded in the social, economic, and ecological fabrics of our present-day society. We ask: what roles do past injustices play in our understanding of intergenerational justice, and what roles can this understanding play in sustainability thought and practice? We weave together reviews from justice and legal studies and environmental ethics. Several short cases illustrate how restorative justice in practice results in benefits for sustainability, including improved resource management and social cohesion and governance. Our review of sustainability literature shows that while only few of the conceptions of intergenerational equity hint at a concern for historical issues, its concern for intra-generational equity may be a place where restorative issues can be addressed. Within sustainability science approaches, restorative issues may also arise in the assessment of the current state as well as in the appreciation of contextual norms and histories of the places attempting to become more sustainable.

Response of Regional Rail Park-and-Ride Users to Parking Price Changes: Systemwide Results and a Detailed Study of Two Stations

Traveler response to the introduction of parking user fees at heavily patronized park-and-ride facilities within the San Francisco Bay Area Rapid Transit (BART) District of California is investigated. After an analysis of systemwide impacts, detailed research at two stations was performed with mail-back surveys, license plate surveys, and focus groups. The primary finding is that introduction of daily parking fees did not cause significant changes in access mode choice, facility location, or line-haul mode of park-and-ride users. New, higher-fee, daily reserved spaces were popular substitutes for monthly reserved spaces. The increased availability of parking spaces shifted arrival times later in the morning at the two stations. Even with user fees, for most trips to regional central business districts the overall cost of using a park-and-ride facility and BART still remained well below the cost of the trip made by automobile only. Overall BART ridership and ridership at those stations where new fees were introduced, remained unchanged.

Comparison of Two Common Approaches to Public Transit Service Equity Evaluation

Understanding the equity effects of transit service changes requires good information about the demographics of transit ridership. Onboard survey data and census data can be used to estimate equity effects, although there is no clear reason to conclude that these two sources will lead to the same findings. Guidance from the FTA recommends the use of either of these data sources to estimate equity impacts. This study made a direct comparison of the two methods for the public transit system in the Phoenix, Arizona, metropolitan area. The results indicated that although both sources were acceptable for FTA compliance, the use of one or the other could affect whether a proposed service change was deemed equitable. In other words, the outcome of a service change equity analysis could differ as a result of the data source used. To ensure the integrity and meaning of such analyses, FTA should recommend the collection and use of ridership data for conducting service change analyses to supplement approaches that are based on census data.

Informal Public Transport: A Global Perspective

This chapter argues that the wide ranging set of informal transport systems that exist throughout many cities in the developing world play an invaluable role in their overall transport systems. Informal public transport modes, often referred to as paratransit services, are a product of a combination of market forces and deprivation, and they often serve areas left unserved or poorly served by formal transport carriers. They can be the only bona fide means of mobility available to the poor. The authors claim that effective programs of franchises, licensing and monitoring can yield highly efficient and flexible services.