Reducing Lane And Shoulder Width To Permit An Additional Lane On A Freeway

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Reducing Lane and Shoulder Width to Permit an Additional Lane on a Freeway

Author : Karen Dixon
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (91 download)

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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.

Reducing Lane and Shoulder Width to Permit an Additional Lane on a Freeway

Author : Karen Dixon
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (911 download)

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Book Synopsis Reducing Lane and Shoulder Width to Permit an Additional Lane on a Freeway by : Karen Dixon

Reducing Lane and Shoulder Width to Permit an Additional Lane on a Freeway

Author : Karen Dixon
Publisher :
ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (91 download)

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Book Synopsis Reducing Lane and Shoulder Width to Permit an Additional Lane on a Freeway by : Karen Dixon

Use of Shoulders and Narrow Lanes to Increase Freeway Capacity

Author : J. E. Curren
Publisher : Transportation Research Board
ISBN 13 : 9780309053693
Total Pages : 92 pages
Book Rating : 4.0/5 (536 download)

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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:

A Policy on Design Standards--interstate System

Author :
Publisher : Aashto
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.3/5 (555 download)

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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:

Use of Narrow Lanes and Narrow Shoulders on Freeways

Author : Louis G. Neudorff
Publisher :
ISBN 13 :
Total Pages : 57 pages
Book Rating : 4.:/5 (961 download)

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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.

Roadway Widths for Low-traffic Volume Roads

Author : Charles V. Zegeer
Publisher : Transportation Research Board
ISBN 13 : 9780309053600
Total Pages : 116 pages
Book Rating : 4.0/5 (536 download)

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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:

Impact of Shoulder Width and Median Width on Safety

Author :
Publisher : National Academies Press
ISBN 13 : 0309117828
Total Pages : 48 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Impact of Shoulder Width and Median Width on Safety by :

Download or read book Impact of Shoulder Width and Median Width on Safety written by and published by National Academies Press. This book was released on 2009 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains the findings of research performed to quantify the safety and operational impacts of design element trade-offs and their associated risks. The report details the research performed and includes specific recommended crash prediction models and Accident Modification Factors (AMFs) for shoulder width and median width on rural four-lane roads.

Roadside Design Guide

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)

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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:

Safety Effectiveness of Highway Design Features: Cross sections

Author :
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Safety Effectiveness of Highway Design Features: Cross sections by :

Download or read book Safety Effectiveness of Highway Design Features: Cross sections written by and published by . This book was released on 1992 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Freeway Modifications to Increase Traffic Flow

Author : William R. McCasland
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Freeway Modifications to Increase Traffic Flow by : William R. McCasland

Download or read book Freeway Modifications to Increase Traffic Flow written by William R. McCasland and published by . This book was released on 1980 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Use of Freeway Shoulders to Increase Capacity

Author : William R. McCasland
Publisher :
ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.3/5 (555 download)

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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.

Traffic Engineering Handbook

Author : ITE (Institute of Transportation Engineers)
Publisher : John Wiley & Sons
ISBN 13 : 1118762304
Total Pages : 688 pages
Book Rating : 4.1/5 (187 download)

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Book Synopsis Traffic Engineering Handbook by : ITE (Institute of Transportation Engineers)

Download or read book Traffic Engineering Handbook written by ITE (Institute of Transportation Engineers) and published by John Wiley & Sons. This book was released on 2016-01-26 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get a complete look into modern traffic engineering solutions Traffic Engineering Handbook, Seventh Edition is a newly revised text that builds upon the reputation as the go-to source of essential traffic engineering solutions that this book has maintained for the past 70 years. The updated content reflects changes in key industry standards, and shines a spotlight on the needs of all users, the design of context-sensitive roadways, and the development of more sustainable transportation solutions. Additionally, this resource features a new organizational structure that promotes a more functionally-driven, multimodal approach to planning, designing, and implementing transportation solutions. A branch of civil engineering, traffic engineering concerns the safe and efficient movement of people and goods along roadways. Traffic flow, road geometry, sidewalks, crosswalks, cycle facilities, shared lane markings, traffic signs, traffic lights, and more—all of these elements must be considered when designing public and private sector transportation solutions. Explore the fundamental concepts of traffic engineering as they relate to operation, design, and management Access updated content that reflects changes in key industry-leading resources, such as the Highway Capacity Manual (HCM), Manual on Uniform Traffic Control Devices (MUTCD), AASSHTO Policy on Geometric Design, Highway Safety Manual (HSM), and Americans with Disabilities Act Understand the current state of the traffic engineering field Leverage revised information that homes in on the key topics most relevant to traffic engineering in today's world, such as context-sensitive roadways and sustainable transportation solutions Traffic Engineering Handbook, Seventh Edition is an essential text for public and private sector transportation practitioners, transportation decision makers, public officials, and even upper-level undergraduate and graduate students who are studying transportation engineering.

Safety Effectiveness of Highway Design Features. Volume III: Cross Sections

Author : Charles V. Zegeer
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Safety Effectiveness of Highway Design Features. Volume III: Cross Sections by : Charles V. Zegeer

Download or read book Safety Effectiveness of Highway Design Features. Volume III: Cross Sections written by Charles V. Zegeer and published by . This book was released on 1992 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effective Utilization of Street Width on Urban Arterials

Author : Douglas W. Harwood
Publisher : Transportation Research Board
ISBN 13 : 9780309048538
Total Pages : 60 pages
Book Rating : 4.0/5 (485 download)

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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:

Safety Evaluation of Lane and Shoulder Width Combinations on Rural, Two-lane, Undivided Roads

Author :
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (496 download)

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Book Synopsis Safety Evaluation of Lane and Shoulder Width Combinations on Rural, Two-lane, Undivided Roads by :

Download or read book Safety Evaluation of Lane and Shoulder Width Combinations on Rural, Two-lane, Undivided Roads written by and published by . This book was released on 2009 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Federal Highway Administration (FHWA) organized a pooled fund study of 26 States to evaluate low-cost safety strategies as part of its strategic highway safety effort. The goal of this study is to evaluate the safety effectiveness of various lane-shoulder width configurations for fixed total paved widths as a countermeasure for roadway departure crashes. Where possible, crash modification factors (CMF) are provided for specific lane-shoulder configurations"--Technical documentation page.

Access Management Manual

Author : Kristine Williams
Publisher :
ISBN 13 : 9780309295413
Total Pages : 529 pages
Book Rating : 4.2/5 (954 download)

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Book Synopsis Access Management Manual by : Kristine Williams

Download or read book Access Management Manual written by Kristine Williams and published by . This book was released on 2014 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Since the publication of the first edition of the Access Management Manual, the context for transportation planning and roadway design in the United States has been transformed. Transportation agencies and local governments are under growing pressure to integrate land use and transportation policy and achieve a more sustainable, energy-efficient transportation system. This second edition of the manual responds to these developments by addressing access management comprehensively, as a critical part of network and land use planning. The content is interdisciplinary, with guidance pertinent to various levels of government as well as to pedestrians, bicyclists, and motorized vehicles, including trucks and buses, and is strongly grounded in decades of research, engineering science, and professional experience. Greater emphasis is placed on appropriate location of access, and guidance is refined to provide appropriate consideration of context and community issues. Substantial updates aid state and local agencies in managing access to corridor development effectively. Specific guidance on network and circulation planning and modal considerations is included, as well as guidance on effective site access and circulation design. A chapter on corridor management reinforces these concepts with a framework for application of access management in different contexts, along with appropriate strategies for each context. There are also new chapters on network planning, regional access management policies and programs, interchange area access management, auxiliary lane warrants and design, and right-of-way and access control. The manual concludes with an extensive menu of access management techniques and information on their application"--Provided by publisher.