[PDF] Safety Performance For Freeway Weaving Segments eBook

Author : Thanh Quang Le
Publisher :
Page : pages
File Size : 36,9 MB
Release : 2011
Category :
ISBN :

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This study adopted the traffic conflict technique, investigated and applied it for evaluation of freeway weaving section safety performance. Conflicts between vehicles were identified based on the state of interactions between vehicles in the traffic stream at microscopic level. The VISSIM microscopic simulation model was employed to simulate traffic operation. Surrogate safety measures were formulated based on deceleration rate required to avoid crash and these simulation-based measures were statistically compared and validated using crash data collected from the same study site. Three study sites located in Houston and Dallas areas were selected. Geometric and traffic data were collected using various technique including the use of traffic surveillance cameras and pneumatic tubes. The study revealed the existence of links between actually observed crashes and the surrogate safety measures. The study findings support the possible the use of microscopic simulation to evaluate safety performance of weaving areas and other transportation facilities.

Author : Lily Elefteriadou
Publisher :
Page : 0 pages
File Size : 49,85 MB
Release : 2024
Category : Roads
ISBN : 9780309709682

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"As drivers place increasing demands on transportation infrastructure and freeway congestion continues to increase, arterials have become an alternative route for many drivers, resulting in the lower performance of these roadways. In many areas, weaving maneuvers - defined as the crossing of two or more traffic streams in the same direction between two or more access points on a multilane urban street with some type of traffic control - negatively affect arterial operations and safety. NCHRP Research Report 1094: Operational Performance and Safety Effects of Arterial Weaving Sections, from TRB's National Cooperative Highway Research Program, presents a deterministic methodology for evaluating the operational performance of weaving sections on arterials."--Publisher's website

Author : Brian Ray (Engineer)
Publisher : Transportation Research Board
Page : 194 pages
File Size : 38,68 MB
Release : 2011
Category : Technology & Engineering
ISBN : 0309155487

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TRB's National Cooperative Highway Research Program (NCHRP) Report 687: Guidelines for Ramp and Interchange Spacing explores guidelines for ramp and interchange spacing based on design, operations, safety, and signing considerations. The report is designed to help aid the decision-making process when an agency is considering new ramps or interchanges on existing facilities, modifying ramps and interchanges of existing facilities, or when planning and designing new highway and interchange facilities. The guidelines also offer standardized definitions measuring ramp and interchange spacing, which have varied in previous design guides. A final report documenting the full research effort related to the development of NCHRP Report 687 was published as NCHRP Web-Only Document 169--

Author : Terrel Shaw
Publisher : Transportation Research Board
Page : 66 pages
File Size : 43,33 MB
Release : 2003
Category : Roads
ISBN : 030906953X

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The Transportation Research Board's National Cooperative Highway Research Program (NCHRP) Synthesis 311: Performance Measures of Operational Effectiveness for Highway Segments and Systems examines the use of performance measures for the monitoring and operational management of highway segments and systems.

Author : Lee August Rodegerdts
Publisher : Transportation Research Board
Page : 407 pages
File Size : 16,31 MB
Release : 2010
Category : Technology & Engineering
ISBN : 0309155118

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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.