Nemzetközi szemle: Április
Vasút és közút szintbeni keresztezések értékelő módszerének fejlesztése
Development of Railroad Highway Grade Crossing Consolidation Rating Formula
Zachary Hans, Chris Albrecht, Patrick Johnson
Iowa State University, USA
The Narwhal Group, USA
Terjedelem: 80 oldal
The goal of this project was to provide an objective methodology to support public agencies and railroads in making decisions related to consolidation of at-grade rail-highway crossings. The project team developed a weighted-index method and accompanying Microsoft Excel spreadsheet based tool to help evaluate and prioritize all public highway-rail grade crossings systematically from a possible consolidation impact perspective. Factors identified by stakeholders as critical were traffic volume, heavy-truck traffic volume, proximity to emergency medical services, proximity to schools, road system, and out-of-distance travel. Given the inherent differences between urban and rural locations, factors were considered, and weighted, differently, based on crossing location. Application of a weighted-index method allowed for all factors of interest to be included and for these factors to be ranked independently, as well as weighted according to stakeholder priorities, to create a single index. If priorities change, this approach also allows for factors and weights to be adjusted. The prioritization generated by this approach may be used to convey the need and opportunity for crossing consolidation to decision makers and stakeholders. It may also be used to quickly investigate the feasibility of a possible consolidation. Independently computed crossing risk and relative impact of consolidation may be integrated and compared to develop the most appropriate treatment strategies or alternatives for a highway-rail grade crossing. A crossing with limited- or low-consolidation impact but a high safety risk may be a prime candidate for consolidation. Similarly, a crossing with potentially high-consolidation impact as well as high risk may be an excellent candidate for crossing improvements or grade separation. The results of the highway-rail grade crossing prioritization represent a consistent and quantitative, yet preliminary, assessment. The results may serve as the foundation for more rigorous or detailed analysis and feasibility studies. Other pertinent site-specific factors, such as safety, maintenance costs, economic impacts, and location-specific access and characteristics should be considered.
Aktivitás alapú utazási modellek: bevezetés
Activity-Based Travel Demand Models: A Primer
Joe Castiglione, Mark Bradley, John Gliebe
Resource Systems Group, Inc., USA
Terjedelem: 181 oldal
In order to support informed decision making, transportation agencies have been increasingly developing and experimenting with activity-based travel demand models that describe how people plan and schedule their daily travel. Activity-based models more closely replicate actual traveler decisions and thus may provide better forecasts of future travel patterns. While there have been recent successes implementing practical activity-based models, these have been limited mostly to larger metropolitan planning organizations (MPOs) and a few state departments of transportation (DOTs). This guide has been developed to help directors, managers, and planners make informed decisions about forecasting model development and application. The guide is composed of two parts. Part 1 is a primer intended to provide a practical overview of activity-based model development and application. Part 2 discusses issues in linking activity-based models to dynamic network assignment models.
Irodalomkutatás és szakirodalmi áttekintés közlekedési kutatási projektekhez
Literature Searches and Literature Reviews for Transportation Research Projects
Andrea Avni, Paul Burley, Patrick Casey, John Cherney, Leighton Christiansen, Janet Saunders Daly, Rita Evans, David Jared, Greg Landgraf, Andrew Meier, Jane Minotti, Barbara Post, Birgitta Sandstedt, Roberto Sarmiento, Susan Sillick, Bob Sweet, Michael Wendt, Ken Winter, and Hong Yu
Conduct of Research Committee Library and Information Science for Transportation Committee Transportation Research Board, USA
Terjedelem: 84 oldal
Research projects sponsored by state departments of transportation (DOTs) routinely require a literature review as part of the research effort. The literature review is a critical portion of the research process in any field of inquiry and an important component of the final research report. For the researcher, a literature review helps to clarify the scope of the research project by creating a narrative of what is and is not known in the field and where there are areas of dispute. For the customer of the research and other readers, the review also provides valuable context, establishes the researcher’s expertise, and relates the findings of the project to what is already known. A working group, comprised of members from both committees, identified four components to address this issue: How to conduct literature searches; Where to search for transportation information; How to put it all together as a quality literature review; and Definitions for related terms.
Közlekedési kutatások gyakorlati felhasználása – a kutatási eredmények alkalmazása
Transport Research Implementation – Application of Research Outcomes
Andrea Meyer, Dana Meyer
Working Knowledge, USA
Terjedelem: 166 oldal
Summary of the Second EU-U.S. Transportation Research Symposium April 10-11, 2014 Paris, France Organized by the European Commission, Office of the Assistant Secretary for Research and Technology and U.S. Department of Transportation, Transportation Research Board.
Peking parkolási kézikönyv
Parking Guidebook for Beijing
Institute for Transportation and Development policy, China
Terjedelem: 162 oldal
Increased car ownership in Beijing has resulted in a higher demand for parking spaces. Rather than taking a restrictive approach to parking as a means to reduce car travel and ownership, the government is trying to increase parking supply in an effort to solve parking problems. The objective of this study is to provide detailed insights into Beijing’s parking issues and offer recommendations to improve on-street and off-street parking policies and systems. The study is financed by the Asian Development Bank, with some input provided by the Beijing Transport Research Institute (BTRC).
Gyorsított leromlási vizsgálatok előzetes út leromlási modelljei
Interim Road Deterioration Models during Accelerated Deterioration a letöltéshez ingyenes regisztráció szükséges
Tim Martin, Lith Choummanivong
Terjedelem: 32 oldal
The accelerated deterioration of pavements subject to increased axle loading needs the development of interim road deterioration (RD) models so that the cost of accelerated deterioration can be estimated. These RD models were based on selected assemblies of road condition data in the rapid deterioration phase. These data selections produced a wide range of data across a time series to enable the development of the RD models for cracking, and cumulative rutting and roughness. The cumulative rutting and roughness RD models have incorporated an RD model for cumulative cracking due to a lack of surface maintenance. These RD models are expected to be a useful tool for the prediction of the consequences of reduced maintenance on pavement conditions and increased axle mass loading.
Közös kimenő adatszerkezet textúra, repedés, teherbírás és csúszásellenállás mérésekhez
A Common Data Output Specification for Texture, Cracking, Strength and Skid Resistance a letöltéshez ingyenes regisztráció szükséges
Hui Chen, Julia Kelley, Michael Moffatt, Young Choi, Tim Martin, Richard Wix
Terjedelem: 74 oldal
The report documents the development of a harmonised approach to road condition data management by Austroads member agencies. The report outlines the results of consultation with member agencies which considered principles, methods, specifications and their application to texture, cracking, strength and skid resistance. The report details common practices used by member agencies to collect data and identifies limitations and proposes solutions to the harmonisation of road condition data.