Safety Performance of Part-Time Shoulder Use on Freeways
Safety Performance of Part-Time Shoulder Use on Freeways

Author:

Publisher:

Published: 2021

Total Pages: 120

ISBN-13:

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Left or right shoulders can be strategically opened as travel lanes, and "part-time shoulder use" is defined as using a shoulder "some, but not all, hours of the day.” The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 309: Safety Performance of Part-Time Shoulder Use on Freeways, Volume 1: Informational Guide and Safety Evaluation Guidelines provides an overview of part-time shoulder use, presents the results of past operational studies, and presents the results of safety research conducted through NCHRP's Safety Performance of Part-time Shoulder Use on Freeways project. Supplemental to the document is a Freeway Analysis Tool, which includes BOS Data, S D PTSU Data, and a Prediction Tool, as well as NCHRP Web-Only Document 309: Safety Performance of Part-Time Shoulder Use on Freeways, Volume 2: Conduct of Research Report.

Guidance for the Design and Application of Shoulder and Centerline Rumble Strips
Guidance for the Design and Application of Shoulder and Centerline Rumble Strips

Author: Darren J. Torbic

Publisher: Transportation Research Board

Published: 2009

Total Pages: 284

ISBN-13: 0309117992

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This report provides guidance for the design and application of shoulder and centerline rumble strips as an effective crash reduction measure, while minimizing adverse effects for motorcyclists, bicyclists, and nearby residents. Using the results of previous studies and the research conducted under this project, safety effectiveness estimates were developed for shoulder rumble strips on rural freeways and rural two-lane roads and for centerline rumble strips on rural and urban two-lane roads.

Impact of Shoulder Width and Median Width on Safety
Impact of Shoulder Width and Median Width on Safety

Author:

Publisher: National Academies Press

Published: 2009

Total Pages: 48

ISBN-13: 0309117828

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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.

Safety Performance of Part-Time Shoulder Use on Freeways
Safety Performance of Part-Time Shoulder Use on Freeways

Author:

Publisher:

Published: 2021

Total Pages: 286

ISBN-13:

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Part-time shoulder use is a congestion relief strategy that allows use of the left or right shoulders as travel lanes during some, but not all, hours of the day. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 309: Safety Performance of Part-Time Shoulder Use on Freeways, Volume 2: Conduct of Research Report describes the development of crash prediction models for freeways with PTSU operation. Supplemental to the document is a Freeway Analysis Tool, which includes BOS Data, S D PTSU Data, and a Prediction Tool, as well as NCHRP Web-Only Document 309: Safety Performance of Part-Time Shoulder Use on Freeways, Volume 1: Informational Guide and Safety Evaluation Guidelines.