The spatial context of transport disadvantage, social exclusion and well-being

Equity has been a major concern of public transport provision and is required by legislation in many countries. Several approaches measure equity in transit supply however none produce a simple system-wide measure of equity performance. A new approach is presented using Lorenz curves to measure the relative supply of transit to the population. Gini coefficients provide a single measure of overall equity using this method. A system-wide assessment of overall transit supply to the population in Melbourne, Australia shows that 70% of the population shares only 19% of the supply (Gini coefficient = .68). When employment is also taken into account, the situation is not much different; 70% of jobs and population share 23% of service (G = .62). In order to gain some understanding of vertical equity, the transit supply was compared between different age, income and vehicle ownership groups. There is some evidence of higher supply for youth and low-income groups in inner Melbourne, and in all parts of Melbourne no-vehicle households lived in areas of higher transit supply. Overall it is unclear how “fair” these distributions are compared to equity in other cities since this is the first time this method has been undertaken. Projects using similar approaches should provide a good basis for establishing comparative equity between cities.     

Shopmobility at the millennium: `Enabling' access in town centres

Shopmobility provides a vital link in the community transport chain. It has been designed to secure for mobility-impaired people equality of access to shopping facilities and `barrier-free' movement within town centres. This agenda is important in the UK given the growing incidence of age-related disability, the spread of pedestrianisation to smaller shopping centres, and publicised development of wayfinding technologies to help disabled people navigate in unfamiliar surroundings. The recent millennium audit of Shopmobility schemes furnishes a national data-base highlighting the demand for services, operating practices in contrasting built-environments, stockholding of equipment, financial management and planning intentions. This report overviews the key findings of that audit within the context of a government commitment to an `inclusionary' and integrated transport policy. It concludes that an adequate and secure stream of financial support is essential for the sustained development of Shopmobility in local contexts, and recommends that Local Transport Plans should ensure that Shopmobility schemes are effectively linked to community and public transport services, and accessible car parking provision for disabled motorists.     

Docked vs. dockless equity: Comparing three micromobility service geographies

Docked bike-share programs have proliferated worldwide, but studies find that the distribution of docked stations is geographically unequal. New dockless systems offer more flexibility compared to docked systems, but it remains unclear if dockless systems can address existing geographic inequities. This study examines all 32 US cities with both docked and dockless micromobility (bikeshare and e-scooter) programs and develops three service geography indicators to compare the geographic equity of docked versus dockless systems. We first use Lorenz curves and Gini indices to examine the overall spatial distribution of micromobility; we then use logistic and Tobit regressions to investigate how service geography corresponds to neighborhood characteristics. Results show that the distribution of docked systems is extremely unequal, and that dockless systems greatly reduce geographical inequalities relative to docked. Low-density areas and neighborhoods with low median household incomes, smaller shares of young people, and fewer zero-car households have limited micromobility service. Docked services are less prevalent in communities of color, and the implementation of dockless systems yields mixed outcomes for racial equity. Importantly, designated service areas do not always translate into available micromobility vehicles. Policymakers should use program design and performance metrics to address the mismatch between designated and actual service geographies and to ensure that micromobility services benefit marginalized communities.     

Exploring public transport equity between separate disadvantaged cohorts: a case study in Perth,Australia

This paper explores the equity distribution of public transport for three separate disadvantaged cohorts including elderly residents, low-income households and no-car households for Perth, Western Australia. It also undertakes a city-wide equity analysis of Perth and compares this with a published analysis for Melbourne. Overall the public transport distribution of the three socially disadvantaged groups was identified to be less equitable when compared to the population as a whole. The elderly had the most inequitable distribution of population relative to other cohorts. Perth’s population exhibits a 0.52 Gini coefficient suggesting a relatively unequal spatial distribution of services to the population. However, this is much better than Melbourne (at 0.68). Results imply that 70% of Perth’s population have only 33% of services supplied, whilst in Melbourne this figure was 19%. Policy implications and areas for future research in this field were identified.     

Multi-city exploration of built environment and transit mode use: Comparison of Melbourne,Amsterdam and Boston

The built environment is an important determinant of travel demand and mode choice. Establishing the relationship between the built environment and transit use using direct models can help planners predict the impact of neighborhood-level changes, that are otherwise overlooked. However, limited research has compared the impacts of the built environment for different networks and for individual transit modes.This paper addresses this gap by developing built environment and transit use models for three multimodal networks, Amsterdam, Boston and Melbourne, using a consistent methodology. A sample of train, tram and bus sites with similar station-area built environments are selected and tested to establish if impacts differ by mode. It is the first study that develops neighborhood-level indicators for multiple locations using a consistent approach.This study compares results for ordinary least squares regression and two-stage least squares (2SLS) regression to examine the impact of transit supply endogeneity on results. Instrumented values are derived for bus and tram frequency in Melbourne and bus frequency in Boston. For other mode and city combinations, the 2SLS approach is less effective at removing endogeneity.Results confirm that different associations exist between the built environment and transit modes, after accounting for mode location bias, and that this is true in multiple networks. Local access and pedestrian connectivity are more important for bus use than other modes. Tram is related to commercial density. This finding is consistent for all samples. Land use mix and bicycle connectivity also tend to be associated with higher tram use. Train use is highest where opportunities exist to transfer with bus. Population density is commonly linked to ridership, but its significance varies by mode and network.More research is needed to understand the behavioral factors driving modal differences to help planners target interventions that result in optimal integration of land use with transit modes.     

A streetcar to be desired? The development of a new approach to measure perception of place quality in the context of tram network modernisation

Recent decades have seen a global resurgence in tram network development around the world. Despite a primary basis in transport, tram network development is increasingly framed as a spatial planning mechanism that is prioritised for its potential place-based outcomes. However, there has been limited academic research to investigate impacts of tram network development on community perception of place quality. This study contributes to the literature by presenting the results of 601 completed questionnaires investigating variation in perception of place quality between legacy and modernised tram streetscapes in Melbourne, Australia. Evidence demonstrates that modernised tram streetscapes were perceived to contain an enhanced physical design compared to their legacy counterparts. Additionally, modernised tram streetscapes were rated as higher quality locations overall that were more likely to facilitate a wide range of place-based activities and amenities. Overall findings provide evidence that tram modernisation can be framed as an opportunity for place quality enhancements, and appear to contradict some of the political complications that have played a role in stalling tram streetscape modernisation projects in Melbourne.     

Accessibility modelling: predicting the impact of planned transport infrastructure on accessibility patterns in Edinburgh,UK

The achievement of good spatial accessibility and equity in the distribution of urban services is one of the supreme goals for urban planners. With Scottish Government backing, the City of Edinburgh Council (CEC) has started to construct a tram network to cater for the future needs of Scotland’s capital city by providing an integrated transport solution using trams and buses. Spatial Network Analysis of Public Transport Accessibility (SNAPTA) which is a GIS-based accessibility model has been developed to measure the accessibility by public transport to different urban services and activities. The model responds to several limitations in other existing accessibility models in planning practice. It offers an alternative and practical tool to help planners and decision makers in examining the strengths and weaknesses of land use – transport integration. SNAPTA has been applied to a pilot study in Edinburgh city to identify the contribution of the infrastructure improvements of the tram system and Edinburgh South Suburban Railway (ESSR) to improved accessibility by public transport to six types of activity opportunities. This paper outlines the concept and methodology of the SNAPTA model, and presents the findings related to this pilot study with a focus on changes in potential accessibility to jobs between four different public transport network scenarios. The accessibility values so obtained help to identify the gaps in the coverage of the public transport network and the efficiency in the spatial distribution of urban services and activities. The findings focus on whether the planned transport infrastructures for Edinburgh will lead to better accessibility and reduced inequity (in terms of accessibility) across the city.     

Realizing proximity in times of deregulation and densification: Evaluating urban change from a welfare regime perspective

We evaluate changes in proximity (in terms of walkability) to essential services in the city region of Gothenburg, Sweden, 1994–2014, when sustainability policy goals were set to promote urban densification and non-motorized mobility. Simultaneously, public services were deregulated, reducing political capacity to control their accessibility. Considering this tension and welfare regime theory, we investigate to what extent typically regulated and deregulated services (libraries, pharmacies, primary schools, and grocery stores) have come closer to the population in areas of different densities and centralities. We draw on unique micro-level data comprising the detailed locations of population and services analyzed using decomposition. Results indicate that services the most (libraries) and least (grocery stores) controlled by public policy decreased in proximity. In contrast, recently deregulated services (pharmacies and primary schools) became more accessible by foot due to disruptive market change. While population relocation reduced the proportion of people living near the services, the changing geography of amenities was a more important driver of proximity change. We argue that sustainability goals to realize proximity have far-reaching repercussions for urban governance, emphasizing the need to assess proximity changes at detailed scale levels.     

Quantifying spatial gaps in public transport supply based on social needs

This paper concerns a research project to identify spatial gaps in public transport provision for people who are socially disadvantaged. The paper outlines the research context for measurement of public transport supply and needs, and then describes the methodology developed for an application in Melbourne, Australia. Results of the application are described including key findings on spatial gaps in services relative to social needs. The research identifies significant gaps between services supplied and social needs for transport services. Consistency of these findings with research in other Australian cities are noted. Implications for policy development are suggested.     

Addressing transit mode location bias in built environment-transit mode use research

Many studies have identified links between the built environment (BE) and transit use. However, little is known about whether the BE predictors of bus, train, tram and other transit modes are different. Studies to date typically analyze modes in combination; or analyze one mode at a time. A major barrier to comparing BE impacts on modes is the difference in the types of locations that tend to be serviced by each mode. A method is needed to account for this ‘mode location bias’ in order to draw robust comparison of the predictors of each mode.This study addresses this gap using data from Melbourne, Australia where three types of public transport modes (train, tram, bus) operate in tandem. Two approaches are applied to mitigate mode location bias: a) Co-located sampling – estimating ridership of different modes that are located in the same place; and b) Stratified BE sampling – observations are sampled from subcategories with similar BE characteristics.Regression analyses using both methods show that the BE variables impacting ridership vary by mode. Results from both samples suggest there are two common BE factors between tram and train, and between tram and bus; and three common BE factors between train and bus. The remaining BE predictors – three for train and tram and one for bus - are unique to each mode. The study's design makes it possible to confirm this finding is valid irrespective of the type of locations serviced by modes. This suggests planning and forecasting should consider the specific associations of different modes to their surrounding land use to accurately predict and match transit supply and demand. The Stratified sampling approach is recommended for treating location bias in future mode comparison, because it explains more ridership variability and offers a transferrable approach to generating representative samples.     

Meeting the on‐line needs of disabled tourists: an assessment of UK‐based hotel websites

The easy exchange of rich information between often geographically dispersed parties is an important precursor of successful tourism transactions. Internet‐based technologies, in particular the World Wide Web, offer possibilities to both buyers and sellers to exchange information without the constraints of geography and time diminishing its richness. The disabled, representing a significant part of any marketplace, may, however, have difficulties accessing the content of the Web and therefore sharing the benefits of rich information exchange. This is the principal concern of ‘Web content accessibility’. Focusing on the tourism sector, in particular UK‐based hotels, this paper examines the accessibility of their websites. However, recognising that it is not just access to information that is important for the disabled, but also the quality of that information, the paper also examines the extent to which the information contained on websites serves their particular needs. Utilising the accessibility testing software ‘Bobby’, disappointingly low levels of Web content accessibility were found amongst the sample of websites. Against a framework of information needs developed from criteria provided by disability organisations, the sample also revealed disappointingly low levels of specific (relevant) information for the disabled. Copyright © 2006 John Wiley & Sons, Ltd.     

Exploring the impact of public transport strikes on travel behavior and traffic congestion

Public transport (PT) disruption can occur due to various factors such as malfunctions and breakdowns of vehicles, power outages, and personnel strikes. This paper explores the network-wide impacts of PT strikes (train, tram, and bus strikes) on traffic congestion in Melbourne, Australia using a network modeling approach. A primary survey aimed to investigate the mode shift of users when each public transport mode ceases was conducted with 648 public transport users in May 2016. Findings show that train withdrawal was expected to result in 43% of users shifting to car. Smaller yet significant shifts to car was also expected with bus withdrawal (34%) and tram withdrawal (17%). Based on the survey results and the use of a four-step transport model, train withdrawal was expected to increase the number of severely congested road links by 130% and reduce the average travel speed from 48 km/h to 39 km/h (20% decrease). Bus and tram withdrawal was also found to increase congestion although the result was less severe. Future research should investigate the switching behavior in actual withdrawal events and explore the long-term effects of public transport withdrawal.     

Shopping morphologies of urban transit station areas: A comparative study of central city station catchments in Toronto,San Francisco,and Melbourne

Synergies between shopping and public transit have long been noted, with main streets emerging along tram lines and shopping malls attached to train stations. The shopping-transit synergy is also at the core of transit-oriented development (TOD), a widespread planning approach to urban sustainability. However, there is a lack of morphological research investigating how shopping clusters around transit stations at a fine-geographic scale. This paper explores the shopping morphologies of three central-city subway station areas in Toronto, San Francisco, and Melbourne, mapping and measuring the extent of public and quasi-public shopfronts relative to the station. The morphological analysis of 200, 300, 400, and 500 m walking catchments shows that as the distance from the station increases, the proportion of shopfronts in the total catchment declines. Quasi-public shopping space can enhance the walkable catchment and permeability of a station area and may contribute to urbanity as long as it adds to diversity of access options. The findings highlight the role walkable shopping environments can play within urban transit station areas and show the importance of nuanced consideration being given to morphologies in the analysis and planning of TODs.     

Public transit accessibility approach to understand the equity for public healthcare services: A case study of Greater Mumbai

Urban public health is one of the most critical yet neglected aspects of urban planning in developing countries such as India. Inequity in access to government healthcare facilities affects the overall urban population and can substantially negatively impact the vulnerable population, who mostly rely on government healthcare services. In this paper, the accessibility measure for healthcare services by public transport is developed using travel time and the number of transit stops (accounting for transit connectivity) for Greater Mumbai. We also identified socially vulnerable wards (administrative units) using a Social Vulnerability Index (SVI), developed based on 16 indicators using Principal Component Analysis (PCA). Developed regression models showed that the proposed accessibility measure explains the coverage and usage of healthcare services better than the traditional accessibility measure, which is based on only aggregate level travel time impedances. South Mumbai has relatively better accessibility for public hospitals and dispensaries, whereas, lower level of accessibility is observed in the eastern part for public healthcare services. Assessment for the spatial inequity based on the Gini index, bivariate Moran's I, and mean access value reveals a higher degree of spatial inequity for accessing government hospitals for the slum population. The study developed a decision framework to suggest effective policy measures, which can be prioritised based on SVI to reduce the disparity in the spatial distribution of accessibility to government healthcare systems for vulnerable groups. Our findings can aid transportation and urban planners, health researchers, and policymakers to improve accessibility in under-served areas and give special attention to the needs of the vulnerable population.     

Exploring the trip chaining behaviour of public transport users in Melbourne

This paper explores trip chaining behaviour of Melbourne residents using evidence from a household travel survey. The research literature has suggested that trip-making behaviour has grown increasingly complex as modern life has become busier and people grow time-poor. Complex trip chains have been said to require flexible travel modes, and for this reason some research has suggested that public transport is limited in this regard compared to the private car. Results of this study show that between 1994 and 1999 the complexity of trip chains was relatively stable and the complexity of chains was found to be larger for rail and tram than for car-based trips. Disaggregate analyses compare the complexity of chains based on work versus non-work chains, the purpose of stops on the chain, and whether the chain entered the central city of Melbourne or not. Overall these findings suggest a less bleak outlook for public transport ridership in a travel future which is said to be becoming more complex.     

Disability,wages, and commuting in New York

In the U.S., substantial employment and wage gaps persist between workers with and without disabilities. A lack of accessible transportation is often cited as a barrier to employment in higher wage jobs for people with disabilities, but little is known about the intraurban commuting patterns of employed people with disabilities in relation to their wage earnings. Our study compares wages and commute times between workers with and without disabilities in the New York metropolitan region and identifies the intraurban zones where residents experience higher inequities in wage earnings and commute times. We obtained our data from the Public Use Microdata Sample (PUMS) of the American Community Survey (ACS) for the 2008–2012 time period. We used linear mixed-effects models and generated separate models with log hourly wage or one-way commute time as the dependent variable. We find significant differences in wages and commute times between workers with and without disabilities at the scale of the metropolitan region as well as by intraurban zone. At the metropolitan scale, disabled workers earn 16.6% less and commute one minute longer on average than non-disabled workers. High commute and wage inequalities converge in the center, where workers with disabilities are more likely to use public transit, earn 17.1% less, and travel nearly four minutes longer on average than workers without disabilities. These results suggest that transport options are less accessible and slower for disabled workers than they are for non-disabled workers. Our findings indicate a need for more accessible and quicker forms of transportation in the center along with an increased availability of centrally located and affordable housing to reduce the disability gap in wages and commute times. We also find that workers with disabilities generally seek higher wages in exchange for longer commute times, but the results differ by race/ethnicity and gender. Compared to white men, minority workers earn much less, and white and Hispanic women have significantly shorter commute times. Our findings offer new geographic insights on how having a disability can influence wage earnings and commute times for workers in different intraurban zones in the New York metropolitan region.     

Can high quality public transport support reduced car parking requirements for new residential apartments?

This paper explores the extent to which high quality public transport can support reduced car parking requirements for new residential apartment buildings. Using a case study of Melbourne, the demand for car parking at residential apartment buildings in proximity to high frequency public transport is assessed, while controlling for a range of socio-demographic, urban design and demand management variables. Key findings indicate that while lower demand for car parking is associated with proximity to high quality public transport, this association is not significant when controlling for other factors that influence car ownership. Public transport service supply within 800 m of residential apartment buildings was instead found to be significant, rather than simple distance to transit. Modelling results suggest an inelastic relationship whereby a 10% increase in public transport service supply is associated with a 0.9–1.2% reduction in car parking demand as measured by levels of car ownership. Notwithstanding broader criticisms of residential off-street parking minimums, the findings have important implications for the development of residential car parking policies, suggesting that city-wide car parking requirements should appropriately reflect the spatial distribution and quality of public transport services.     

The suburbanization of poverty and changes in access to public transportation in the Triangle Region,NC

During the last 50 years, a number of economic forces led to noteworthy changes in the geography of poverty in the US. Employment decentralization and lack of affordable housing have resulted in many low-income households migrating to suburban areas, and as of today, the majority of the low-income population of metropolitan regions resides in the suburbs. Focusing on the Triangle Region, NC, this study systematically explores the changes in the geography of poverty and transit access over time to better understand how accessibility to transit has changed for the low-income residents. Spatial panel data models are also estimated to investigate the relationship between poverty and transit access at the neighborhood level and how it varies spatially and temporally, while accounting for unobserved heterogeneity and spatial autocorrelation. Results indicate that between 1990 and 2015, the outer-ring suburbs experienced the highest increase in both poverty and transit access, although improvements in transit access were lower in the recently urbanized areas within the outer-ring suburbs. Inner-ring suburbs experienced a substantial rise in poverty rate and low-income population, and a comparable increase in transit access. Central cities remained the areas with the highest poverty rate and transit access in the Triangle Region but experienced smaller changes over time compared to suburban areas. The findings of the econometric analysis suggest that poverty rate and transit access are not significantly related at the neighborhood level when time-invariant unobservable characteristics are accounted for.     

Evaluation of wider economic impacts of light rail investment on cities

Transport plays a critical role in facilitating competitiveness in post-industrial economies. High quality transport services and infrastructure enhance internal and external connectivity. This research examines published and unpublished evidence of economic impacts of modern light rail (tram and light metro) systems in the United Kingdom and globally. Evidence is considered relating outcomes of investment in light rail systems to: unlocking previously hard to reach sites for development; triggering fresh growth through elimination of significant transport constraints; stimulation of inward investment; extension of labour market catchment areas; reorganisation or rationalisation of production, distribution and land use; and land and property value increase and capture. Urban light rail investment can help regenerate Central Business Districts and boost employment and property prices. Similar rail investments in different locations may not however have the same economic impacts — geography matters. Other conditions in addition to transport investment are required for positive externalities.