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Use Of Narrow Lanes And Narrow Shoulders On Freeways
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Book Synopsis Use of Narrow Lanes and Narrow Shoulders on Freeways by : Louis G. Neudorff
Download or read book Use of Narrow Lanes and Narrow Shoulders on Freeways written by Louis G. Neudorff and published by . This book was released on 2016 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Congested freeways are often located in urban areas with constrained environments and/or rights-of-way where significant widening of the roadway is not practical due to adjacent developments and land use, physical constraints, along with limited availability of funding. Among the strategies for increasing freeway capacity in such constrained environments — and thereby reducing congestion and improving operations — is to add a travel lane within the existing roadway footprint by reducing the widths of the existing lanes and/or shoulders. The additional lane may be utilized by all traffic at all times, as a special use or managed lane that is open only to specific types of vehicles or movements (e.g., High Occupancy Toll (HOT) lane, exit only lane), or only during selected times of the day and/or when congestion warrants opening the lane (e.g., temporary shoulder use). Narrow lanes and shoulders may be applied to add capacity on the freeway mainline and in interchange areas including ramps. This primer provides information to policy makers, transportation agency managers, designers and operators on the use of narrow lanes and narrow shoulders to improve capacity within an existing roadway footprint. Much of the information contained in the primer is presented in the broader context of both Performance Based Planning and Programming (PBPP) and Performance — Based Practical Design (PBPD). Primer contents include case studies on the use of narrow lanes, issues and approaches for analyzing the operational and safety impacts of narrow lanes and narrow shoulders, and the role of transportation systems management and operations (TSMO) in support of narrow lanes operations.
Book Synopsis Use of Shoulders and Narrow Lanes to Increase Freeway Capacity by : J. E. Curren
Download or read book Use of Shoulders and Narrow Lanes to Increase Freeway Capacity written by J. E. Curren and published by Transportation Research Board. This book was released on 1995 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Narrow Lanes and Narrow Shoulders on Freeways by : Louis G. Neudorff
Download or read book Use of Narrow Lanes and Narrow Shoulders on Freeways written by Louis G. Neudorff and published by . This book was released on 2016 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Shoulders and Narrow Lanes to Increase Freeway Capacity by :
Download or read book Use of Shoulders and Narrow Lanes to Increase Freeway Capacity written by and published by . This book was released on 1995 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of Freeway Shoulders to Increase Capacity by : William R. McCasland
Download or read book The Use of Freeway Shoulders to Increase Capacity written by William R. McCasland and published by . This book was released on 1984 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Narrower lanes and use of shoulders tested on sections of the Southwest Freeway, Houston.
Book Synopsis Roadway Widths for Low-traffic Volume Roads by : Charles V. Zegeer
Download or read book Roadway Widths for Low-traffic Volume Roads written by Charles V. Zegeer and published by Transportation Research Board. This book was released on 1994 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Policy on Design Standards--interstate System by :
Download or read book A Policy on Design Standards--interstate System written by and published by Aashto. This book was released on 2005 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reducing Lane and Shoulder Width to Permit an Additional Lane on a Freeway by : Karen Dixon
Download or read book Reducing Lane and Shoulder Width to Permit an Additional Lane on a Freeway written by Karen Dixon and published by . This book was released on 2015 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research effort identified the operational and safety implications of using reduced lane and shoulder widths for a variety of freeway configurations. The research team used speed, crash, and geometric data for freeways in Dallas, Houston, and San Antonio. The operational analysis identified an increase of about 2.2 mph in speed for a 12-ft lane as compared to an 11-ft lane. The shoulder width is significant when the adjacent lane is 11-ft wide, but not when it is 12- ft wide which suggests that left shoulder width is more important with a reduced lane width. Operating speeds on Texas freeways are 2 mph lower during night time (with roadside lighting present) than during the day. Speeds were higher (by 1.5 mph) on the weekends (Saturday) than on the week day studied (Wednesday). The safety analysis determined a crash difference when comparing freeways with 12 ft to 11 ft lanes. There is a reduction in KAB crashes that ranges from 5% for 2-lane freeways up to 12% for 5-lane freeways, other roadway characteristics equal. Similarly, there are crash reductions associated with each additional lane, increased left shoulder widths, and increased right shoulder widths. While constructing an additional lane is beneficial in terms of safety, a larger safety detriment caused by narrow lanes or shoulders annuls such benefit. However, if it is possible to increase the total paved width when adding a travel lane, the safety model allows the analyst to identify lane and shoulder widths so that the number of crashes along the corridor will expectedly remain unchanged.
Book Synopsis Use of Freeway Shoulders for Travel by : Pete M. Jenior
Download or read book Use of Freeway Shoulders for Travel written by Pete M. Jenior and published by . This book was released on 2016 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part-time shoulder use is the conversion of shoulders to travel lanes during some hours of day as a congestion relief strategy. This strategy is also known as temporary shoulder use or hard shoulder running, and is typically implemented on freeways. Part-time shoulder use is a transportation system management and operations (TSM&O) strategy that uses shoulders to provide additional capacity when it is most needed, and preserves shoulders as refuge areas during the majority of the day. This guide covers planning, design, implementation, and day-to-day operation of shoulder use. It covers a wide variety of design and operational concepts for shoulder use, and describes how a performance based practical design (PBPD) process guides the planning of facilities with shoulder use.
Download or read book Gravel Roads written by Ken Skorseth and published by . This book was released on 2000 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Book Synopsis Rumble Strips for Roads with Narrow Or Non-existent Shoulders by : Lily Elefteriadou
Download or read book Rumble Strips for Roads with Narrow Or Non-existent Shoulders written by Lily Elefteriadou and published by . This book was released on 2001 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Roundabouts by : Lee August Rodegerdts
Download or read book Roundabouts written by Lee August Rodegerdts and published by Transportation Research Board. This book was released on 2010 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 :American Association of State Highway and Transportation Officials. Task Force for Roadside Safety Publisher : ISBN 13 : Total Pages :560 pages Book Rating :4.0/5 ( download)
Book Synopsis Roadside Design Guide by : American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Download or read book Roadside Design Guide written by American Association of State Highway and Transportation Officials. Task Force for Roadside Safety and published by . This book was released on 1989 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geometric Design Practices for European Roads by : James O. Brewer
Download or read book Geometric Design Practices for European Roads written by James O. Brewer and published by DIANE Publishing. This book was released on 2001 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessing and Managing the Ecological Impacts of Paved Roads by : National Research Council
Download or read book Assessing and Managing the Ecological Impacts of Paved Roads written by National Research Council and published by National Academies Press. This book was released on 2006-01-22 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: All phases of road developmentâ€"from construction and use by vehicles to maintenanceâ€"affect physical and chemical soil conditions, water flow, and air and water quality, as well as plants and animals. Roads and traffic can alter wildlife habitat, cause vehicle-related mortality, impede animal migration, and disperse nonnative pest species of plants and animals. Integrating environmental considerations into all phases of transportation is an important, evolving process. The increasing awareness of environmental issues has made road development more complex and controversial. Over the past two decades, the Federal Highway Administration and state transportation agencies have increasingly recognized the importance of the effects of transportation on the natural environment. This report provides guidance on ways to reconcile the different goals of road development and environmental conservation. It identifies the ecological effects of roads that can be evaluated in the planning, design, construction, and maintenance of roads and offers several recommendations to help better understand and manage ecological impacts of paved roads.
Book Synopsis A Guide for Achieving Flexibility in Highway Design by :
Download or read book A Guide for Achieving Flexibility in Highway Design written by and published by AASHTO. This book was released on 2004 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Context-sensitive solutions (CSS) reflect the need to consider highway projects as more than just transportation facilities. Depending on how highway projects are integrated into the community, they can have far-reaching impacts beyond their traffic or transportation function. CSS is a comprehensive process that brings stakeholders together in a positive, proactive environment to develop projects that not only meet transportation needs, but also improve or enhance the community. Achieving a flexible, context-sensitive design solution requires designers to fully understand the reasons behind the processes, design values, and design procedures that are used. This AASHTO Guide shows highway designers how to think flexibly, how to recognize the many choices and options they have, and how to arrive at the best solution for the particular situation or context. It also strives to emphasize that flexible design does not necessarily entail a fundamentally new design process, but that it can be integrated into the existing transportation culture. This publication represents a major step toward institutionalizing CSS into state transportation departments and other agencies charged with transportation project development.
Book Synopsis Effective Utilization of Street Width on Urban Arterials by : Douglas W. Harwood
Download or read book Effective Utilization of Street Width on Urban Arterials written by Douglas W. Harwood and published by Transportation Research Board. This book was released on 1990 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
