Author: Paul B. W. Dorothy
Publisher: Transportation Research Board
ISBN: 0309143454
Category : Technology & Engineering
Languages : en
Pages : 175

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Book Description
At head of title: National Cooperative Highway Research Program.

Author: Aram Kornsombut
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 300

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Book Description
Geometric design standards have not been developed specifically for low volume roads. Design standards and criteria are extrapolated from higher standard roadways that are often not relevant to low volume roads. Safety is a primary criterion used for selection of design standards along with economic, financial, social and environment factors. This study attempts to determine trade-offs of various design standards and designs based on safety and economic criteria. It also summarizes existing geometric design standards that are employed by federal, state and county governments. A methodology for selection of design standards for low volume roads employing safety criteria is developed. The study approach is based on data and relationships from previous research. Accident costs cited by National Safety Council are adopted for analysis. Procedures are developed to determine the balance between design standards and accident costs. Ten-foot lane width and two-foot shoulder width are found to be reasonable for low volume situations. Horizontal and vertical alignments affect safety, vehicle running costs and travel times. Guardrail warrants of low volume roads differ from that of high volume roads. The balance and trade-offs between guardrail installation cost and accident cost expected for a given embankment geometry are evaluated. The balance between a clear zone from the edge of pavement and the accident cost savings has also been developed. It is recommended that a comparison between the accident savings due to roadway improvement and the incremental construction cost must be made to evaluate safety and economy effectively. An approach to evaluate the level of safety relative to design is developed for decision making.

Author: Hugh W. McGee
Publisher: Transportation Research Board
ISBN: 0309223830
Category : Highway design
Languages : en
Pages : 106

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Book Description
Chapter one. Introduction -- Chapter two. Results of initial survey of state departments of transportation -- Chapter three. Background information on project development and design methods -- Chapter four. Profiles of states with practical design policies -- Chapter five. Findings, conclusions, and suggested research.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 798

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Book Description

Author: Lee August Rodegerdts
Publisher: Transportation Research Board
ISBN: 0309155118
Category : Technology & Engineering
Languages : en
Pages : 407

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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: Marcus Brewer
Publisher: Transportation Research Board
ISBN: 0309223598
Category : Technology & Engineering
Languages : en
Pages : 90

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Book Description
RB’s National Cooperative Highway Research Program (NCHRP) Synthesis 432: Recent Roadway Geometric Design Research for Improved Safety and Operations reviews and summarizes roadway geometric design literature completed and published from 2001 through early 2011, particularly research that identified impacts on safety and operations.

Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 316

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Book Description

Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 56

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Book Description

Author:
Publisher:
ISBN:
Category : Energy conservation
Languages : en
Pages : 36

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Book Description

Author: Keith Wolhuter
Publisher: CRC Press
ISBN: 1482288729
Category : Technology & Engineering
Languages : en
Pages : 600

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Book Description
Explore the Art and Science of Geometric DesignThe Geometric Design of Roads Handbook covers the design of the visible elements of the road-its horizontal and vertical alignments, the cross-section, intersections, and interchanges. Good practice allows the smooth and safe flow of traffic as well as easy maintenance. Geometric design is covered in d