Nchrp Report 518

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NCHRP Report 518

Anonim
NCHRP Report 518 Book PDF

Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 53,5 Mb
Release : 2004
Category : Electronic
ISBN : OCLC:1065854073

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NCHRP Report 518 by Anonim Pdf

Managing Selected Transportation Assets

Michael J. Markow,National Cooperative Highway Research Program
Managing Selected Transportation Assets Book PDF

Author : Michael J. Markow,National Cooperative Highway Research Program
Publisher : Transportation Research Board
Page : 199 pages
File Size : 52,9 Mb
Release : 2007
Category : Airports
ISBN : 9780309097895

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Managing Selected Transportation Assets by Michael J. Markow,National Cooperative Highway Research Program Pdf

NCHRP synthesis 371 explores the state of the practice for managing transportation infrastructure assets other than pavements and bridges, and documents gaps in knowledge and areas in need of potential further study.

Safety Evaluation of Permanent Raised Pavement Markers

Geni Brafman Bahar,National Cooperative Highway Research Program
Safety Evaluation of Permanent Raised Pavement Markers Book PDF

Author : Geni Brafman Bahar,National Cooperative Highway Research Program
Publisher : Transportation Research Board
Page : 71 pages
File Size : 49,7 Mb
Release : 2004
Category : Reflectors (Safety devices)
ISBN : 9780309087902

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Safety Evaluation of Permanent Raised Pavement Markers by Geni Brafman Bahar,National Cooperative Highway Research Program Pdf

"TRB's National Cooperative Highway Research Program (NCHRP) Report 518: Safety Evaluation of Permanent Raised Pavement Markers examines the safety performance of snowplowable permanent raised pavement markers on two-lane roadways and four-lane freeways"--Publisher's description.

Summary of Progress - National Cooperative Highway Research Program

National Cooperative Highway Research Program
Summary of Progress National Cooperative Highway Research Program Book PDF

Author : National Cooperative Highway Research Program
Publisher : Unknown
Page : 156 pages
File Size : 48,8 Mb
Release : 2009
Category : Highway research
ISBN : CORNELL:31924071691822

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Summary of Progress - National Cooperative Highway Research Program by National Cooperative Highway Research Program Pdf

Guidance for Implementation of the AASHTO Strategic Highway Safety Plan

Timothy R. Neuman,National Cooperative Highway Research Program
Guidance for Implementation of the AASHTO Strategic Highway Safety Plan Book PDF

Author : Timothy R. Neuman,National Cooperative Highway Research Program
Publisher : Transportation Research Board
Page : 94 pages
File Size : 45,6 Mb
Release : 2008
Category : Head-on collisions
ISBN : 9780309099363

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Guidance for Implementation of the AASHTO Strategic Highway Safety Plan by Timothy R. Neuman,National Cooperative Highway Research Program Pdf

Also available online via the Web pages of the TRB Cooperative Research Programs (www4.trb.org/trb/crp.nsf).

Synthesis of Benefits and Costs of Alternative Lane Marking Strategies

Michael D. Fontaine
Synthesis of Benefits and Costs of Alternative Lane Marking Strategies Book PDF

Author : Michael D. Fontaine
Publisher : Unknown
Page : 70 pages
File Size : 55,8 Mb
Release : 2009
Category : Road markings
ISBN : NWU:35556038801304

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Synthesis of Benefits and Costs of Alternative Lane Marking Strategies by Michael D. Fontaine Pdf

The Virginia Department of Transportation (VDOT) currently uses snowplowable raised pavement markers (SRPMs) to supplement longitudinal pavement markings on some facilities. SRPMs are much more visible than traditional longitudinal markings under wet, nighttime conditions. SRPMs have been reported to dislodge from pavement, however, which has raised the question as to whether alternative marking materials might be able to replace SRPMs. The purpose of this study was to investigate the visibility performance of longitudinal pavement marking materials currently on the market. The specific objectives of this study were (1) to determine whether or not new pavement marking materials could be used in place of SRPMs; (2) if SRPMs were to be used, to develop guidelines for their installation and maintenance; and (3) to determine the costs and benefits of using SRPMs to the maximum extent possible. No new data on the visibility or durability of pavement marking materials were collected for this study. The study primarily synthesized existing research on the characteristics of different marking materials and then applied information derived from the synthesis to Virginia-specific data to estimate the impacts of using different materials. National practices for installing, inspecting, and maintaining SRPMs were also reviewed. The results of the literature review indicated that SRPMs remain the only marking system that provides sufficient nighttime preview time at high speeds, especially under wet conditions. Further, SRPMs can improve safety in certain situations, but they can also degrade safety in other situations since drivers may travel at higher speeds when the distance they can see down the road at night increases. Proposed guidelines for the installation and maintenance of SRPMs were developed. They recommend that SRPMs be installed on all limited access freeways, on all two-lane roads with an average daily traffic volume above 15,000 vehicles per day, and on all roads with a posted speed limit of 60 mph or greater. Several other situations where SRPMs might be installed based on engineering judgment were also identified. A proposed maintenance schedule that requires inspections every 2 to 3 years was also developed. A conservative economic analysis indicated that the benefits of installing and maintaining SRPMs using the guidelines developed in this study outweighed the costs by more than 80 to 1, based purely on potential safety improvements on road geometries where SRPMs have been shown to improve safety. Further, VDOT can realize cost savings by discontinuing SRPM usage on low-volume facilities and by revising particular SRPM standards.

Report

Anonim
Report Book PDF

Author : Anonim
Publisher : Unknown
Page : 452 pages
File Size : 52,5 Mb
Release : 2008
Category : Highway research
ISBN : CUB:P205082015011

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Report by Anonim Pdf

Highway Safety Manual

Anonim
Highway Safety Manual Book PDF

Author : Anonim
Publisher : AASHTO
Page : 886 pages
File Size : 42,5 Mb
Release : 2010
Category : Technology & Engineering
ISBN : 9781560514770

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Highway Safety Manual by Anonim Pdf

"The Highway Safety Manual (HSM) is a resource that provides safety knowledge and tools in a useful form to facilitate improved decision making based on safety performance. The focus of the HSM is to provide quantitative information for decision making. The HSM assembles currently available information and methodologies on measuring, estimating and evaluating roadways in terms of crash frequency (number of crashes per year) and crash severity (level of injuries due to crashes). The HSM presents tools and methodologies for consideration of 'safety' across the range of highway activities: planning, programming, project development, construction, operations, and maintenance. The purpose of this is to convey present knowledge regarding highway safety information for use by a broad array of transportation professionals"--p. xxiii, vol. 1.

Factors Contributing to Median Encroachments and Cross-median Crashes

Douglas W. Harwood
Factors Contributing to Median Encroachments and Cross median Crashes Book PDF

Author : Douglas W. Harwood
Publisher : Unknown
Page : 100 pages
File Size : 41,6 Mb
Release : 2014
Category : Express highways
ISBN : RUTGERS:39030041647019

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Factors Contributing to Median Encroachments and Cross-median Crashes by Douglas W. Harwood Pdf

"TRB's National Cooperative Highway Research Program (NCHRP) Report 790: Factors Contributing to Median Encroachments and Cross-Median Crashes investigates the factors that contribute to median-related crashes and identifies design treatments and countermeasures that can be applied to improve median safety on divided highways."--Publisher description.

Communicating Changes in Horizontal Alignment

R. W. Lyles,William C. Taylor,National Cooperative Highway Research Program
Communicating Changes in Horizontal Alignment Book PDF

Author : R. W. Lyles,William C. Taylor,National Cooperative Highway Research Program
Publisher : Transportation Research Board National Research
Page : 52 pages
File Size : 51,8 Mb
Release : 2006
Category : Technology & Engineering
ISBN : UVA:X030118197

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Communicating Changes in Horizontal Alignment by R. W. Lyles,William C. Taylor,National Cooperative Highway Research Program Pdf