Journal: Transportation Research Record

Abbreviation

Transp. Res. Rec.

Publisher

Transportation Research Board

Journal Volumes

ISSN

0361-1981
2169-4052

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Publications 1 - 10 of 104
  • Karlsruhe 1975-1995
    Item type: Journal Article
    Brandl, Peter G.; Axhausen, Kay W. (1998)
    Transportation Research Record
  • Basis of the swiss design standard for roundabouts
    Item type: Journal Article
    Spacek, Peter (2004)
    Transportation Research Record
  • Introducing the pedestrian accessibility tool: Walkability analysis for a geographic information system
    Item type: Journal Article
    Erath, Alexander; van Eggermond, Michael A.B.; Ordóñez, Sergio A.; et al. (2017)
    Transportation Research Record
    The indexes for walkability proposed so far refer generally to the closest amenities and public transport stops and the existing network structure. The weights of the attributes do not reflect the independently measured preferences of the users and residents. Design attributes such as the location and type of crossings and walkway design features are usually surveyed in walkability audits. However, such attributes are usually not considered when pedestrian walksheds or other accessibility-based walkability indexes are calculated. Nevertheless, these design attributes are very relevant for actual planning decisions. The proposed walkability index can be behaviorally calibrated, has been implemented as a geographic information system tool, and is published as open source software. The pedestrian accessibility tool allows the evaluation of existing and future urban plans with regards to walkability. The tool calculates Hansen-based accessibility indicators with the use of a customizable specification of the generalized walking costs, and it incorporates user-defined weights of destination attractiveness. The basic user workflow of the tool is summarized. Three case studies show real-world applications of the tool to support the planning of pedestrian infrastructure in an urban context. With indications of potential areas of improvement that have been reported by pilot users working in an urban planning department, hints are also given for future research.
  • Capacity of small roundabouts with two-lane entries
    Item type: Conference Paper
    Lindenmann, Hans Peter (2006)
    Transportation Research Record
    Roundabouts have been a popular system for intersections outside downtown zones in urban areas in Switzerland for more than 10 years. One form of small roundabout becoming more common in Switzerland is the system with short two-lane approaches and a single-lane extrawide circulatory roadway. Research shows that small roundabouts with two-lane entries with a single-lane extrawide circulatory roadway have capacities 20% to 30% higher than those with single-lane entries, although the space requirements are almost identical. The fact that roundabouts with two-lane entries and a single-lane extrawide circulatory roadway have shown good performance with respect to capacity, traffic flow, and driver behavior, as well as a high level of safety, has led to an increasing use of this type of roundabout in Switzerland.
  • Airport Cities and Airport Public Transport Access - Demand Balancing or Peak Exacerbation?
    Item type: Journal Article
    Orth, Hermann; Weidmann, Ulrich (2014)
    Transportation Research Record
  • Modeling station-based and free-floating carsharing demand
    Item type: Journal Article
    Ciari, Francesco; Bock, Benno; Balmer, Michael (2014)
    Transportation Research Record
    Carsharing, in any form, is still growing around the world. One of the effects is the increasing number of cities in which multiple carsharing operators are competing. The carsharing industry has never been as competitive as it is now: the present is a good time for researchers to invest efforts in providing tools for the assessment and planning of carsharing programs. Nevertheless, efforts in this direction are still scarce, in particular for some of the newest forms in which carsharing has been implemented, such as free-floating carsharing. This paper reports on a study that made use of MATSim, an agent-based simulation software that had already been used to model station-based carsharing, to evaluate different carsharing scenarios for the city of Berlin. The main findings are the existing high potential to extend carsharing services further in Berlin and the apparent complementarity of station-based and free-floating carsharing. On the methodological level, the work introduces a new tool for the modeling of free-floating carsharing along with improvements of the previously existing station-based carsharing model.
  • Capturing human activity spaces
    Item type: Journal Article
    Rai, Rohit K.; Balmer, Michael; Rieser, Marcel; et al. (2007)
    Transportation Research Record
  • Synthetic population generation by combining a hierarchical, simulation-based approach with reweighting by generalized raking
    Item type: Journal Article
    Casati, Daniele; Müller, Kirill; Fourie, Pieter J.; et al. (2015)
    Transportation Research Record
    A recent approach for generating populations of synthetic individuals through simulation is extended to produce households of grouped individuals. The contingency tables of the generated populations match external controls on the individual and household levels while exhibiting far greater variety in composition than existing approaches can offer. The method involves a two-step approach. The first consists of a procedure based on Gibbs sampling, which has only recently been applied to population generation in transportation modeling and is generically called Markov chain Monte Carlo (MCMC). For this work, the model was generalized, and an extension was developed, hierarchical MCMC, which was able to generate a hierarchical structure. The second step, a postprocessing step, uses generalized raking (GR), which reweights the output from hierarchical MCMC to perfectly satisfy known marginal control totals on the individual and household levels. The application input data—a demographic sample and some known marginals from Singapore—added further complexities to the problem, which had not yet been explored in the current literature. Despite data challenges, consecutively applying the methods above produced realistic synthetic populations. Results confirm their goodness of fit and their generated hierarchical structures.
  • BusViz Big Data for Bus Fleets
    Item type: Journal Article
    Anwar, Afian; Odoni, Amedeo; Toh, Nelson (2016)
    Transportation Research Record
  • Eighty weeks of global positioning system traces
    Item type: Journal Article
    Wolf, Jean; Schönfelder, Stefan; Samaga, Ute; et al. (2004)
    Transportation Research Record ~ Data and information technology
Publications 1 - 10 of 104