Bicycling Access and Egress to Transit: Informing the Possibilities

When effectively integrated with transit services, considerable room exists for bicycling to realize various benefits to communities. A successful marriage between bicycling and transit will likely increase the use and efficiency of both modes. A core problem, however, exists in that the predominant approach for integrating bicycles and transit—bicycles aboard transit vehicles—frequently runs up against capacity restraints. Integrating bicycling and transit requires analysis of a broad range of alternatives that considers both the travel patterns and needs of individuals but also accompanying urban form characteristics. What are the most cost effective strategies likely to generate the largest number of cyclists accessing transit? To aid in developing a framework to evaluate the cost effectiveness of different strategies to integrate transit and bicycling this project: (1) reviews the state of the knowledge, (2) proposes an analysis framework for communities and transit agencies to consider in efforts to maximize the integration of bicycling and transit, (3) conducts focus groups with cyclists from five case study communities to gauge preferences for bicycle and transit integration strategies, and (4) develops a preliminary application to evaluate four bicycle and transit integration strategies based on focus group discussions and use of the Analytic Hierarchy Process (AHP). These evaluation measures are applied to five communities. A CTU index provides an initial attempt to understand transit stops that have a higher likelihood to attract CTUs. The Analytic Hierarchy Process ranked cyclists’ preferences for four bicycle and transit integration strategies in order of preference: (1) “Bike ON transit” (transporting the owner’s bicycle aboard( inside or outside) the transit vehicle) (0.471), (2) “Bike TO transit” (using and parking the owner’s bicycle at a transit access location) (0.185), (3) “Shared bike” (sharing a bicycle, which would be based at either the transit access or egress point) (0.185), and (4) “Two bike” (using an owner’s two bicycles at the access and egress location) (0.159). Results of the cost effectiveness assessment suggest that “Bike ON transit” ranked most cost effective overall, followed by “Bike to transit,” “Two bike,” and “Shared bike” strategies

The End of Traffic and the Future of Access: A Roadmap to the New Transport Landscape

In most industrialized countries, car travel per person has peaked and the automobile regime is showing considering signs of instability. As cities across the globe venture to find the best ways to allow people to get around amidst technological and other changes, many forces are taking hold — all of which suggest a new transport landscape. Our roadmap describes why this landscape is taking shape and prescribes policies informed by contextual awareness, clear thinking, and flexibility

Reliability Testing of the PABS (Pedestrian and Bicycling Survey) Method

The Pedestrian and Bicycling Survey (PABS) is a questionnaire designed to be economical and straightforward to administer so that it can be used by local governments interested in measuring the amount and purposes of walking and cycling in their communities. In addition, it captures key sociodemographic characteristics of those participating in these activities. Methods: In 2009 and 2010 results from the 4-page mail-out/mail-back PABS were tested for reliability across 2 administrations (test-retest reliability). Two versions--early and refined--were tested separately with 2 independent groups of university students from 4 universities (N = 100 in group 1; N = 87 in group 2). Administrations were 7 to 9 days apart. Results: Almost all survey questions achieved adequate to excellent reliability. Conclusions: Transportation surveys have not typically been tested for reliability making the PABS questionnaire an important new option for improving information collection about travel behavior, particularly walking and cycling

Visual Eye Gaze While Cycling: Analyzing Eye Tracking at Signalized Intersections in Urban Conditions

The manner in which cyclists visually perceive elements of the urban environment plays an important role in bicycle crashes, which have been increasing in recent years. Yet, how visual information is processed by the user while riding a bike is still poorly analyzed by researchers. This study investigates cyclists' eye gaze behavior at signalized intersections taking into account a set of gaze characteristics. Recording cyclist's visual fixations by mobile-eye glasses in a real outdoor environment, a total of 13 field tests have been analyzed along a three-kilometer route in the urban center of Bologna, Italy. Findings reveal key differences in gaze behavior by experience level of the cyclist and type of intersection.</p

Simple, Inexpensive Approach to Sampling for Pedestrian and Bicycle Surveys

Many transportation planners undertake local surveys for a better understanding of the levels of walking and cycling of residents in their city or town. This paper explores the challenges of designing a robust sampling strategy for such surveys. A review of existing surveys on nonmotorized transportation demonstrated that many existing surveys used less than ideal sampling approaches for communities that were aiming to collect populationwide data on cycling and walking and thereby jeopardized the strength of their conclusions. Either surveys used approaches that were too expensive and complex for most communities to implement or surveys generated data that were not applicable to all residents in a community (i.e., data that were not generalizable to the full population). In response to that sampling problem, this paper presents a new method for collecting generalizable data: the sampling method developed in the Pedestrian and Bicycling Survey (PABS) project. PABS offers a rigorous, yet inexpensive, simple, and well-documented method to conduct surveys. The PABS mail-out-mail-back survey and probabilistic (generalizable) sampling approach can be performed in-house within municipal agencies. With the use of PABS, transportation professionals can obtain higher-quality data about their community as a whole than they would obtain with many of the other existing approaches. PABS is thus a useful complement to other sampling approaches such as intercept surveys (an important way to collect data on the use of specific facilities) or surveys distributed to e-mail lists (a cheap and useful way to collect qualitative data)

A Schematic for Focusing on Youth in Investigations of Community Design and Physical Activity

This paper provides a first step in addressing special considerations for youth in a relatively new area of physical activity research. After reviewing the urgent need for novel approaches to increasing physical activity, the growing interest in the effects of community design are discussed. Although most discussion on this topic has focused on adults, there are important differences between youth and adults that warrant a special focus on youth and need to be accounted for. This article presents a schematic that accounts for how and where youth spend their time, decomposing the day into time spent in travel and time spent at destinations, and identifying portions of those times that are spent engaged in physical activity. By focusing on both spatial and behavioral dimensions of youth time, the schematic may help organize and advance scientific inquiry into the relationships between community design and physical activity specifically for youth

Emergency Streets Addressing the Public Health Emergency on US Streets & Roadways

Traffic violence is outstripping local, regional, and federal efforts to reduce injuries and deaths. Governmental responses to the crisis have failed to stem the tide of death on our roadways. What can and should government agencies do? This paper describes a countermeasure known as &ldquo;Emergency Streets,&rdquo; which reacts to a demonstrated transport system failure with a compulsory, corrective response: all motor vehicle drivers in the vicinity must slow down for a period of time before being allowed to resume regular driving. A standardized response to fatal crashes like Emergency Streets can help sidestep some of the existing bureaucratic and cultural barriers to slower, safer driving, without compromising other public priorities.</p

JTLU special issue editorial: Bicycling in changing urban regions

As communities around the globe contemplate the future of their transport portfolio, bicycling's role has increasingly cropped up as a key discussion point. Up until a few years ago, bicycling's value was largely fueled by a loyal advocacy base. Its potential was littered with unsupported claims and bicycling struggled to obtain legitimate status, even as, or precisely because of its status as a "fringe mode." This context has recently changed. Concomitant with—or perhaps prompted by—a rise in (public and policy attention for) bicycling, there has been a rise in research specifically on bicycling. In just a few years, bicycling's stock has risen to be a mode that is commanding attention in cities of all sizes. Furthermore, its role and value are informed by a burgeoning evidence base, increasingly in the form of peer-reviewed work. This evidence base allows, among other things, a more reflective appreciation for bicycling's position in transport systems and for bicycling to be better understood in different geographical contexts

Atomically sharp domain walls in an antiferromagnet

The interest in understanding scaling limits of magnetic textures such as domain walls spans the entire field of magnetism from its relativistic quantum fundamentals to applications in information technologies. The traditional focus of the field on ferromagnets has recently started to shift towards antiferromagnets which offer a rich materials landscape and utility in ultra-fast and neuromorphic devices insensitive to magnetic field perturbations. Here we report the observation that domain walls in an epitaxial crystal of antiferromagnetic CuMnAs can be atomically sharp. We reveal this ultimate domain wall scaling limit using differential phase contrast imaging within aberrationcorrected scanning transmission electron microscopy, which we complement by X-ray magnetic dichroism microscopy and ab initio calculations. We highlight that the atomically sharp domain walls are outside the remits of established spin-Hamiltonian theories and can offer device functionalities unparalleled in ferromagnets.Comment: 8 pages, 4 figures, Supplementary informatio

Defect-driven antiferromagnetic domain walls in CuMnAs films

Efficient manipulation of antiferromagnetic (AF) domains and domain walls has opened up new avenues of research towards ultrafast, high-density spintronic devices. AF domain structures are known to be sensitive to magnetoelastic effects, but the microscopic interplay of crystalline defects, strain and magnetic ordering remains largely unknown. Here, we reveal, using photoemission electron microscopy combined with scanning X-ray diffraction imaging and micromagnetic simulations, that the AF domain structure in CuMnAs thin films is dominated by nanoscale structural twin defects. We demonstrate that microtwin defects, which develop across the entire thickness of the film and terminate on the surface as characteristic lines, determine the location and orientation of 180∘ and 90∘ domain walls. The results emphasize the crucial role of nanoscale crystalline defects in determining the AF domains and domain walls, and provide a route to optimizing device performance