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Author: Lee Rodegerdts Publisher: Transportation Research Board ISBN: 0309098742 Category : Roads Languages : en Pages : 125
Book Description
"Research sponsored by the American Association of State Highway and Transporation Officials in cooperation with the Federal Highway Administration."
Author: Lee Rodegerdts Publisher: Transportation Research Board ISBN: 0309098742 Category : Roads Languages : en Pages : 125
Book Description
"Research sponsored by the American Association of State Highway and Transporation Officials in cooperation with the Federal Highway Administration."
Author: Lee August Rodegerdts Publisher: Transportation Research Board ISBN: 0309155118 Category : Technology & Engineering Languages : en Pages : 407
Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.
Author: Publisher: ISBN: 9780309703956 Category : Traffic circles Languages : en Pages : 0
Book Description
Roundabout implementation in the United States has increased in the last decade, and practitioners have learned lessons in successfully applying roundabouts in various land use and transportation environments and contexts. Associated with NCHRP Research Report 1043: Guide for Roundabouts, which provides information and guidance on all aspects of roundabouts, the TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 347: Background and Summary of a Guide for Roundabouts describes the development of the guide and the research on which it is based.
Author: Kittleson & Associates Publisher: ISBN: 9780309698405 Category : Traffic circles Languages : en Pages : 0
Book Description
Roundabout implementation in the United States has increased in the last decade, and practitioners have learned lessons in successfully applying roundabouts in various land use and transportation environments and contexts. The TRB National Cooperative Highway Research Program's NCHRP Research Report 1043: Guide for Roundabouts provides information and guidance on all aspects of roundabouts. Supplemental to the report is NCHRP Web-Only Document 347: Background and Summary of a Guide for Roundabouts, which describes the research for and development of the guide.
Author: Bruce W. Robinson Publisher: ISBN: Category : Roads Languages : en Pages : 292
Book Description
The guidance supplied in this document, Roundabouts: an informational guide, is based on established international and U.S. practices and is supplemented by recent research. The guide is comprehensive in recognition of the diverse needs of transportation professionals and the public for introductory material through design detail, as well as the wide range of potential applications of roundabout intersections. The following topics are addressed: definition of a roundabout and what distinguishes roundabouts from traffic circles; public acceptance and legal issues associated with roundabouts; consideration of all user modes, including heavy vehicles, buses, transit, bicycles, and pedestrians; a methodology for identifying appropriate sites for roundabouts and the range of conditions for which roundabouts offer optimal performance: methodologies for estimating roundabout capacity, delays, and queues with reference to the Highway Capacity Manual; design principles and guidance on safety and geometric design, with reference to applicable national standards such as the AASHTO Policy on Geometric Design of Highways and Streets; guidelines for control features such as signing and pavement markings, with reference to the Manual on Uniform Traffic Control Devices; illumination; and landscaping.
Author: Bastian J. Schroeder Publisher: Transportation Research Board ISBN: 0309155304 Category : Architecture Languages : en Pages : 152
Book Description
TRB' National Cooperative Highway Research Program (NCHRP) Report 674: Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities explores information related to establishing safe crossings at roundabouts and channelized turn lanes for pedestrians with vision disabilities. Appendices B through N to NCHRP Report 674 were published as NCHRP Web-Only Document 160.
Author: Mitsuru Saito (Ph.D., P.E.) Publisher: ISBN: Category : Roads Languages : en Pages : 52
Book Description
Roundabouts have become increasingly popular in the United States in the past ten years. UDOT has recently installed three roundabouts on its state highways (Park City, Lehi, and Bloomington). Requests for installation of roundabouts replacing traditional intersections are expected to grow. However, UDOT does not have specific guidelines or criteria to judge whether roundabouts would be appropriate for the requested sites. The intent of this project was to summarize key isuues concerning roundabouts and develop a preliminary draft of design guidelines and policies that could be used for the implementation of a roundabout instead of some other form of intersection. Only a few state DOTs had design guidelines on roundabouts at the time of the study. US experiences have not been adequate for creating solid, universal design and analysis guidelines on roundabouts and at the time of the study, a multi-year NCHRP study has just started. The leading software packages used for the design, analysis, and simulation of roundabouts are originated in other countries, such as RODEL (United Kingdom) and aaSIDRA (Australia), where roundabouts have been in existence for many years and in numbers. The former is empirical based on thousands of roundabouts and the latter is based on the gap theory. Engineers do not agree on the best methodology for analysis, and therefore, various software packages with different methodologies exist. The HCS and Synchro 6.0 software programs have gap-based models and their analysis capabilities are not at the level of sophistication as the foreign counterparts. The NCHRP study (NCHRP) 3-65 Applying Roundabouts in the United States is about to be completed at the time of the publication of this report and it is recommended that this report be referenced.
Author: Publisher: ISBN: Category : Roads Languages : en Pages :
Book Description
Based on a comprehensive evaluation of roundabouts in the United States, NCHRP Report 572 presents methods of estimating the safety and operational impacts of roundabouts and updates design criteria for them. This web document contains the appendices to NCHRP Report 572, as follows: (A) Literature Review on Safety Performance; (B) Literature Review of Operational Models; (C) Site Inventory; (D) Pedestrian and bicycle Analysis Details; (E) Summary of Goodness-of-Fit Measures and Statistical Terms; (F) Statistical Testing of Intersection-Level Safety Models; (G) Definitions for Estimating Fastest Vehicle Paths; (H) Statistical Testing of Approach-Level Safety Models; (I) Statistical Testing of Speed-Based Safety Models; (J) Operations Appendix; (K) Pedestrian Analysis Tables; (L) Pedestrian and Bicycle Images; (M) Draft Highway Capacity Manual Chapter 17; and (N) Research Problem Statement.
Author: Tomaž Tollazzi Publisher: Springer ISBN: 3319090844 Category : Science Languages : en Pages : 214
Book Description
This book presents a history of roundabouts, an introduction to their design, calculations of their capacity and traffic-safety features. It describes the key features of standard roundabouts and their limitations. Alternative types of roundabouts are a fairly recent development and have only been implemented in a few countries to date. The book illustrates a broad variety of these recent alternative types of roundabouts, as well as proposed types still in the development phase, explaining for each the specific needs it meets, its advantages and drawbacks. In closing, the book offers an outlook on the role of roundabouts in future street traffic.
Author: Lee Rodegerdts
Author: Lee Rodegerdts
Author: Lee August Rodegerdts
Author: 
Author: Kittleson & Associates
Author: National Cooperative Highway Research Program
Author: Bruce W. Robinson
Author: Bastian J. Schroeder
Author: Mitsuru Saito (Ph.D., P.E.)
Author: 
Author: Tomaž Tollazzi