Evaluating Success in Urban Freeway Planning

The development of U.S. urban transportation policy over the past 50 years illustrates the changing relationship between federal, state, and local governments. This comprehensive text examines the evolution of urban transportation planning from early developments in highway planning in the 1930s to the concern for sustainable development and pollution emissions. Focusing on major national events, the book discusses the influence of legislation, regulations, conferences, federal programs, and advances in planning procedures and technology. The book offers an in-depth look at the most significant event in transportation planning—the Federal-Aid Highway Act of 1962. Creating a federal mandate for a comprehensive urban transportation planning process carried out cooperatively by states and local governments with federal funding, this act was crucial in the spread of urban transporation. Claiming that urban transportation planning is more sophisticated, costly, and complex than its highway and transit planning predecessors, the book demonstrates how urban transportation planning evolved in response to changes in such factors as environment, energy, development patterns, intergovernmental coordination, and federal transit programs. It further illustrates how broader concerns for global climate change and sustainable development have braided the purview of transportation planning.

The four-step transportation planning methodology—trip generation, distribution, modal split, and traffic assignment—was developed decades ago and is still largely the platform of many existing models in practice. Nevertheless, in the past decade, new approaches have been developed to augment and improve components of this platform or to seek new modeling paradigms. It is timely to take inventory of what we have so far and to provide a preview of what lies ahead. In fact, in terms of methodological advances, improving the planning process to make it more accurate and reflective of reality is one important aspect. It is often criticized that the sequential four-step planning procedure, lacking feedback between steps, comes-up short of capturing actual behavior. Another aspect in methodological advances, equally important, is to broaden the consideration to include vital elements that were ignored in the past. Planning procedures that incorporate environmental and sustainability considerations are such good examples. This special issue is the first part of two issues on this topic. This special issue focuses on recent methodological advances in urban transportation planning; the upcoming issue pertains to emerging techniques for urban transportation planning. Four papers are contained in this special issue, as summarized below. The paper by Boyce, ‘‘Is the Sequential Travel Forecasting Paradigm Counterproductive?’’ provides an overview of the historical development and applications of the sequential travel forecasting procedure. The author questions the validity of the current paradigm, pointing to the shortcomings of considering the procedure as individual steps. The author then proposes a new travel-forecasting paradigm that integrates travel choices, leading to an integrated, internally consistent travel and route choice model. The paper by Black et al., ‘‘Sustainable Urban Transportation: Performance Indicators and Some Analytical Approaches,’’ begins by stating the importance of considering sustainability in urban transport planning and the lack of analytical tools for this purpose, including the lack of appropriate sustainability indicators. The authors then propose a study framework, define sustainability indicators, and depict tools for the analysis, using Sydney, Australia as a case study for illustration purposes. EDITORIAL

Integrating social equity into urban transportation planning: A critical evaluation of equity objectives and measures in transportation plans in North America

Urban transportation planning in transition

Freight transport is essential to modern urban civilization. No urban area could exist without a reliable freight transport system. Although the private sector is responsible for much of this system, the public sector has a vital role to play in the provision of infrastructure and the establishment of a social and legal framework within which transport can occur. For these reasons, goods movement deserves and is increasingly receiving, explicit consideration in urban transport policy and planning. Many cities around the world have conducted studies aimed at resolving urban goods movement problems and a considerable, if disparate, body of research results are available. This book brings together much of this knowledge and experience in a comprehensive source of information on urban freight, particularly from a public policy or planning viewpoint. It provides both a conceptual basis for urban goods movement analysis and detailed, practical guidelines which may be used directly by those responsible for urban freight policy and planning. The author has worked for over twenty years in this field and he draws upon his experience in Australia, the United States, Great Britain, Canada and The Philippines to produce a book which is international in scope and perspective. The book is written for practising professionals, such as engineers, economists and planners, working in local government, urban transport planning agencies, highway authorities, consultancies, or research institutes; it is also relevant to graduate courses in transport planning, traffic engineering or urban policy. It is of interest to all who have a concern for contemporary issues in urban development.

BackgroundEveryday activities, such as walking or cycling, may be a feasible and practical way to integrate physical activity into everyday life. Walking and cycling for transport or recreation in the area local to a person’s home may have additional benefits. However, urban planning tends to prioritise car use over active modes. We explored the cross-sectional association between living near an urban motorway and local walking and cycling.MethodsIn 2013, residents living in an area (a) near a new urban motorway (M74), (b) near a longstanding urban motorway (M8), or (c) without a motorway, in Glasgow, Scotland, were invited to complete postal surveys assessing local walking and cycling journeys and socio-demographic characteristics. Using adjusted regression models, we assessed the association between motorway proximity and self-reported local walking and cycling, as well as the count of types of destination accessed. We stratified our analyses according to study area.ResultsOne thousand three hundred forty-three residents (57% female; mean age: 54 years; SD: 16 years) returned questionnaires. There was no overall association between living near an urban motorway and the likelihood of local walking or cycling, or the number of types of local destination accessed by foot or bicycle.In stratified analyses, for those living in the area around the new M74 motorway, increasing residential proximity to the motorway was associated with lower likelihood of local recreational walking and cycling (OR 0.63, 95% CI: 0.39 to 1.00) a pattern not found in the area with the longstanding M8 motorway. In the area near the M8 motorway residential proximity was statistically significantly (p = 0.014) associated with a 12% decrease in the number of types of destination accessed, a pattern not found in the M74 study area.ConclusionsOur findings suggest that associations between living near a motorway and local walking and cycling behaviour may vary by the characteristics of the motorway, and by whether the behaviour is for travel or recreation. The lack of associations seen in the study area with no motorway suggests a threshold effect whereby beyond a certain distance from a motorway, additional distance makes no difference.

La riorganizzazione del sistema della mobilità è spesso una delle chiavi interpretative più rilevanti nelle scelte di governo delle trasformazioni urbane. Nella gran parte degli interventi di trasformazione urbana orientati alla riqualificazione della città il ruolo delle scelte connesse al sistema della mobilità è sempre più incidente anche per la definizione del disegno urbano delle aree di trasformazione, ma soprattutto per migliorare l’efficienza e la vivibilità del sistema urbano. Il ruolo della pianificazione del sistema della mobilità rappresenta l’oggetto di questo lavoro. In particolare, l’articolo si sofferma su alcuni piani urbanistici di recente produzione elaborati per città italiane di grandi dimensioni (Roma, Bologna, Milano) per i quali la pianificazione del sistema della mobilità ha costituito l’occasione per rilanciare una nuova visione della città. Gli esempi riportati in questo articolo rappresentano il tentativo di mostrare come, in qualche misura, la pratica urbanistica stia rispondendo alla necessità di integrare obiettivi di sviluppo urbano ed esigenze della pianificazione dei trasporti orientandoli verso obiettivi comuni tesi al raggiungimento di una maggiore vivibilità.

The performance of public transport operations, land-use and urban transport planning in Hong Kong

The design level of urban transportation planning is an important symbol to measure a city's modernization level. Improving the design level is of great significance for the performance of city functions, as well as the development of the regional economy. This paper firstly expounds on the main contents, basic ideas of the planning and the development tendency of current urban transportation planning. It then takes Paris, Hong Kong, and Seoul as examples to show the view's applications in actual traffic planning. Finally, it analyzes the reconstruction of Second Ring Road in Chengdu with the view of putting forward its own opinions.

N ow urban rail transit (URT) plan in China has some problems such as inconsistent with urban overall plan (UOP) and urban transportation plan (UTP). According to such condition, trinity system of UOP, UTP and URT plan is advanced, among which URT plan should be focused on and its system structure is researched on from URT development strategy plan and URT overall plan, and URT overall plan is analyzed from network plan and network control plan. Therefore, URT plan is studied and good plan can produce good URT construction so that healthy and sustainable development of URT can be achieved.

A critical aspect of designing road pavements is accurately estimating the expected traffic load. It's important to note that not all vehicles use the same wheel path when traveling on a road. Many factors, including the Lane Distribution Factor (LDF), can affect the lateral shift of the load applied to the pavement. LDF is a crucial factor in designing flexible pavements, as it helps transportation planners and highway engineers estimate lane usage relative to the total traffic volume. This information is essential for understanding how pavements respond to wheel loads and fatigue behavior. The IRC: 37 - 2018 guidelines provide a set of LDFs for estimating the design traffic in terms of Million Standard Axle Loads. However, to ensure the accuracy of these LDFs, a study was conducted on rural and urban highways with two and four lanes to identify the lateral distribution of the vehicles.

Transportation planning is changing. What used to be a concern with motorized vehicles only is evolving into a discipline dealing with multimodal systems where priority is given to transit and nonmotorized means of transport, chief among them being walking. The city of Bat Yam in Israel has chosen to pioneer planning for pedestrians as an integral component of its transportation master plan. This article presents a novel use of pedestrian movement modeling within urban transportation planning, by means of pedestrian movement volume prediction maps for the city, both at its current state today and at its future state planned for the year 2030. The study shows that a pedestrian movement distribution can be explained mainly by the spatial variables that represent properties of a street network. Changes to this network structure are relatively rare, and, therefore, pedestrian movement will not change in a fundamental way in the future. Furthermore, by overlaying the models for pedestrian movement and motorized traffic, as well as the underlying public transit and bicycle networks, focus can be on those streets and places where conflicts among the various road users (i.e., pedestrians, bicycles, transit vehicles, and private cars) are expected.

Urban freeways often cut through the heart of a city, destroying neighborhoods, displacing residents, and reconfiguring street maps. These massive infrastructure projects, costing billions of dollars in transportation funds, have been shaped for the last half century by the ideas of highway engineers, urban planners, landscape architects, and architects -- with highway engineers playing the leading role. In Changing Lanes, Joseph DiMento and Cliff Ellis describe the evolution of the urban freeway in the United States, from its rural parkway precursors through the construction of the interstate highway system to emerging alternatives for more sustainable urban transportation. DiMento and Ellis describe controversies that arose over urban freeway construction, focusing on three cases: Syracuse, which early on embraced freeways through its center; Los Angeles, which rejected some routes and then built I-105, the most expensive urban road of its time; and Memphis, which blocked the construction of I-40 through its core. Finally, they consider the emerging urban highway removal movement and other innovative efforts by cities to re-envision urban transportation.

The emerging ride-sourcing service has become an important element of urban mobility. A challenging question underlying the provision of such service is how and to what extent the built environment affects origin-destination (OD) travel flows. This paper employs the geographically weighted regression (GWR) model to analyze the OD-based ride-sourcing travel flow. It makes a comparison with the existing ordinary least square (OLS) model and spatial autocorrelation model (SAM). We have collected ride-sourcing order data in Hangzhou, China, to provide an accurate source for acquiring ride-sourcing travel flow. We investigate the effects of the residential area, points of interest (POIs), and transit stations on ride-sourcing travel flow among traffic analysis zones (TAZs). The results show the following: (a) GWR has better goodness-of-fit than SAM and OLS. (b) Residential area, enterprise, and bus stations have positive correlations with ride-sourcing OD flows, but education and subway stations have negative correlations. We have further investigated the issue and found that it is not a causal relationship between the bus station and OD flow, due to collinearity between the two variables. The bus station builds on locations with high demand, but its capacity is not large enough to reduce the ride-sourcing flow to a low level, which results in a positive coefficient. (c) Based on the estimated coefficients, the prediction of ride-sourcing flows is feasible, supporting the impact analysis for urban land use and transportation planning. This paper contributes to understanding OD-based ride-sourcing travel flow distributions and provides a framework of long-term OD flow prediction for urban land use and transportation planning.

Urban transportation planning has traditionally focused on capacity and congestion issues with some attention paid to operation and management and with the treatment of such issues typically made proactively. In contrast, road safety has received little attention in the planning process. Safety-conscious planning is a new proactive approach that incorporates safety issues into the transportation planning process. This approach requires a safety planning decision-support tool to facilitate a proactive approach to the assessment of safety implications of alternative network planning initiatives and scenarios. The objective of this research study is to develop a series of zonal-level collision prediction models that are consistent with conventional models commonly used for urban transportation planning. A generalized linear regression modeling approach with the assumption of a negative binomial error structure was employed for exploring relationships between collision frequency in a planning zone and some explanatory variables such as traffic intensity, socioeconomic and demographic factors, land use, and traffic demand measures. Planning-level safety models developed in this study with data for the city of Toronto, Canada, are presented with illustrative applications of how they can be used as decision-support tools for planners to explicitly consider safety in the transportation planning process. Macrolevel collision modification factors are presented to illustrate how the models can be used to examine the impact of each individual planning variable on the safety of an urban zone.