Nemzetközi szemle: Augusztus
Közúti biztonsági éves jelentés 2016.
Road Safety Annual Report 2016
Szerző(k): IRTAD, OECD
Terjedelem: 540 oldal
The IRTAD Road Safety Annual Report 2016 provides an overview for road safety performance for 2014 in 40 countries, with preliminary data for 2015, and detailed reports for each country. It includes tables with cross country comparisons on key safety indicators. The report outlines the most recent safety data in IRTAD countries, including detailed analysis by road user, age group and type of road. It describes the crash data collection process in IRTAD countries, the road safety strategies and targets in place and information on recent trends in speeding, drink-driving and other aspects of road user behaviour.
15. nemzetközi konferencia a különleges használatú forgalmi sávokról
15th International Conference on Managed Lanes
Szerző(k): A konferencia előadói,
Terjedelem: 20 oldal letölthető előadás linkekkel
A 2016. májusban Miamiban tartott konferencia programja a letölthető előadások linkjeivel.
A kerékpározás értéke The Value of Cycling
Szerző(k): Phil Jones Associates, University of Birmingham, UK
Terjedelem: 36 oldal
This report was commissioned to provide a review of the literature on the value of cycling. It focuses on evidence of the wider economic benefits of cycling as a mode of transport, such as retail revenue, employment effects, and public spending efficiencies. In conclusion, there is substantial discourse about the benefits of cycling. These benefits are found across a range of thematic spheres (e.g. improving accessibility, increasing employment access, contributing to vibrant communities and individual well-being) and geographic scales (neighbourhood, local, regional, national). However, despite assertions of various positive impacts, the literature is less forth-coming about the ways in which these may be realistically captured. The nuanced impacts that go beyond mainstream economic measures are difficult to harness into substantiated and replicable metrics. For cycling’s potential to be realised and infrastructure schemes to be financed, there is a need to give priority to developing appraisal methods that incorporate the full range of relevant cost and benefits that relate to cycling, and indeed consistently across all modes of transport. Social accounting and audit may be one approach that offers a framework for exploring the broader scope of assessment as it concerns itself with more than economic impacts and is not solely expressed in financial terms. It accepts the use of qualitative input, incorporates multiple perspectives, and includes social, economic and environmental impacts.
Igény alapú jelzésidő felülvizsgálat 2. fázis – éles üzemi megvalósítás
Demand Based Signal Retiming Phase 2 – Real-World Implemenation
Szerző(k): A. Stevanovic, J. So, M. Ostojic, B. Ostojic, N. Petrovska, D. Pappusetty, D. Radivojevic, Florida Atlantic University, USA
Terjedelem: 131 oldal
Monitoring and managing arterial operations represents a significant problem for many public agencies in the US. Arterial streets, more numerous and covering much larger road networks than freeways, get less attention when it comes to deployment of ITS technologies and availability of data that is accurate and reliable enough to manage traffic in real time. Even when such data are available, the agencies face lack of developed procedures and strategies on how to handle such data in order to better monitor and manage arterial operations. The overall goal of this research was to develop a set of strategies for monitoring and managing arterial streets that would take in consideration idiosyncratic needs, challenges and policies of the public agencies managing arterials in southeastern Florida. Restrained by lack of resources and time, these agencies (Palm Beach County, Broward County, and City of Boca Raton) could benefit from FDOT and FAU assistance to improve their arterial operations. Thus the research presented here describes development of several methods and applications, which all heavily relay on various levels of available data, to monitor and manage traffic operations on arterial networks. Considering that ‘one-size-fits-all’ solution does not apply in real-life problems of Traffic Management Centers, the proposed techniques and applications cover a variety of field conditions and data specifications and thus they can be applicable to many other agencies in FL and nationwide.
Automatikus forgalomszámláló hálózat optimális kialakítása Minnesota államban
Optimizing Automatic Traffic Recorders Network in Minnesota
Szerző(k): D. Gupta, X. Tang, University of Minnesota, USA
Terjedelem: 103 oldal
Accurate traffic counts are important for budgeting, traffic planning, and roadway design. With thousands of centerline miles of roadways, it is not possible to install continuous counters at all locations of interest (e.g., intersections). Therefore, at the vast majority of locations, MnDOT samples axle counts for short durations, called portable traffic recorder (PTR) sites, and obtains continuous counts from a small number of strategically important locations. The continuous-count data is leveraged to convert short-duration axle counts into average-annual-daily traffic counts. This requires estimation of seasonal adjustment factors (SAFs) and axle correction factors at short count locations. This project focused on developing a method for estimating SAFs for PTR sites. The continuous count data was grouped into a small number of groups based on seasonal traffic-volume patterns. Traffic patterns at PTR sites were hypothesized by polling professional opinions and then verified by performing statistical tests. PTRs with matching seasonal patterns inherited SAFs from the corresponding continuous-count locations. Researchers developed a survey tool, based on the analytic hierarchy process, to elicit professional judgments. MnDOT staff tested this tool. The statistical testing approach was based on bootstrapping and computer simulation. It was tested using simulated data. The results of this analysis show that in the majority of cases, three weekly samples, one in each of the three seasons, will suffice to reliably estimate traffic patterns. Data could be collected over several years to fit MnDOT’s available resources. Sites that require many weeks of data (say, more than five) may be candidates for installation of continuous counters.
Aszfaltburkolat kipergésének meghatározására szolgáló algoritmus fejlesztése új 3D lézer technológiával és makrotextúra elemzéssel
Szerző(k): Y.J. Tsai, Z. Wang, Georgia Institute of Technology, USA
Terjedelem: 50 oldal
Raveling is one of the most common asphalt pavement distresses that occur on U.S. highway pavements. Raveling will increase pavement roughness, which results in poor ride quality and road and tire noise. Besides safety concerns, such as loose stones that may break windshield glass and can cause hydroplaning, raveling will also shorten pavement longevity. Thus, a raveling condition survey is required for highway agencies to determine the severity levels, the extents, and the locations of raveling so the preservation or rehabilitation treatments can be appropriately applied. However, the traditional raveling survey method, including determination of the raveling severity level (e.g., Low, Moderate, or High; or Severity Level 1, 2, or 3), extent, and location is a visual inspection that is time consuming, subjective, and hazardous to highway workers. Thus, there is an urgent need for developing an automatic survey method. Although some algorithms have been developed to detect and classify raveling, they are still at the very early research stage and the outcomes were often not acceptable. In addition, they have not been thoroughly validated using large-scale, real-world data. Therefore, it has been difficult for transportation agencies to implement any of such algorithms. To address the problems in existing raveling detection and classification methods, the objective of this study is to develop successful and effective raveling detection, classification, and measurement algorithms using three-dimensional (3D) pavement data and macro-texture analysis, and to comprehensively validate these methods using large-scale, real-world data. The proposed algorithms have demonstrated promising capabilities to automatically detect and measure asphalt pavement raveling. Using the proposed algorithms will, potentially, save tremendous amounts of manual effort in field surveys, improve data accuracy, and help highway agencies make more informed decisions on pavement maintenance and rehabilitation. The developed algorithms are based on 3D pavement data that had been already collected (in this case, for automatic rutting and cracking data collection). Thus, using the same data collected for extracting other types of distresses will save great amounts of time and money by eliminating the need to make additional effort for data collections. The research outcome of this study will have a significant impact on state transportation agencies and industry by reducing the time and money spent on collecting asphalt pavement raveling data.
Közlekedési rendszerek teljesítmény mérése és adatai – az 5. nemzetközi konferencia összefoglalása
Szerző(k): K.F. Turnbull, Transportation Research Board, USA
Terjedelem: 114 oldal
The 5th International Transportation Systems Performance Measurement and Data Conference was held June 1–2, 2015, in Denver, Colorado. The conference was organized by the Transportation Research Board (TRB) of the National Academies of Science, Engineering, and Medicine and was sponsored by the Federal Highway Administration (FHWA), the Federal Transit Administration (FTA), and the Performance Measures Technical Transfer Pooled Fund project. The conference brought together personnel from public agencies, universities, and the private sector to address developing, applying, and delivering performance measures to support transportation decisions. The conference attracted 320 participants from 12 countries, and sessions were streamed live to 100 remote-access participants. This report has been reviewed in draft form by individuals chosen for their
diverse perspectives and technical expertise, in accordance with procedures approved by the National Research Council’s Report Review Committee.
Felületi bevonatok változatai
Seal coats are one of many techniques commonly used for asphalt pavement preservation and chip seals are the most commonly used in Minnesota. In some applications, chip seals are not the best surface treatment alternative, such as in areas with frequent or high stress turning movements like cul-de-sacs or intersections, and can suffer chip loss and/or bleeding. The purpose of this Transportation
Research Synthesis (TRS) was to summarize current seal coat practices and identify alternatives that provide pavement protection, extend pavement life similar to chip seals, and avoid the identified problems. Other surface treatment techniques used around the country include fog seals, bio seals, sand seals, sandwich seals, slurry seals, and micro surfacing and include many proprietary or brand name products.
Élelmiszer ellátási elosztási lánc adatgyűjtés
Food Distribution Supply Chain Data Collection
Szerző(k): A.V. Goodchild, L. Ukrainczyk, University of Washington, USA
Terjedelem: 57 oldal
This report summarizes the work completed under the SHRP2 (Strategic Highway Research Program 2) Local Freight Data program. Supply chain firm interviews and truck counts were conducted to better understand the Food Distribution System in the Puget Sound. Interviews explored key business challenges, operations, and potential responses to natural gas incentives. Truck counts were conducted at grocery stores, and observations included truck type, time of day, stop duration, and parking behavior. The report includes a description of truck activity at grocery stores, and a summary of industry responses to natural gas incentives. The research contributes to the design of future freight data collection, and the development of policy responsive freight models.
USA Washington állam közlekedési folyosó kapacitás értékelési kézikönyv
Szerző(k): Washington State Department of Transportation, USA
Terjedelem: 48 oldal
The Washington State Department of Transportation (WSDOT) has been publishing system performance analysis for well over a decade. The annual Corridor Capacity Report, previously known as the Congestion Report, draws attention from a wide spectrum of people from around the state of Washington and the nation. Congestion measurements and methods to communicate capacity management results have evolved over the years. As performance measures have become more sophisticated, communicating them has become increasingly challenging. To ensure every reader is informed, WSDOT has created the following methodology document to help users navigate our multimodal analysis of transportation system performance. This methodology document provides complete descriptions of WSDOT’s approach to multimodal system performance evaluation, including our maximum throughput philosophy, multimodal performance measures, and associated thresholds. The first two chapters present these concepts, and the following chapters focus on specific performance measurement areas (such as travel delay, travel times, etc.). These chapters provide detailed measure definitions, step-by-step analysis procedures, equations, sample calculations, data sources and background information to help other agencies produce these measures for their own transportation systems. The goal of the current document is to serve as the one-stop-shop for WSDOT’s methodology used to produce the annual Corridor Capacity Report. This document is aimed at anyone interested in or involved with presenting system performance data collection, analysis and evaluation to a broader audience.