The Roadside Design Guide presents a synthesis of current information and operating practices related to roadside safety and is written in dual units—metric and U.S. Customary.
The guide is intended to be used as a resource document from which individual highway agencies can develop standards and policies. It includes a synthesis of current information and operating practices related to roadside safety. It focuses on safety treatments that can minimize the likelihood of serious injuries when a motorist leaves the roadway. This guide was written for use by design engineers and professionals involved in roadside safety and is considered a significant toll that combines current research with practical experience.
The 2011 edition of the AASHTO Roadside Design Guide has been updated to include hardware that has met the evaluation criteria contained in the National Cooperative Highway Research Program (NCHRP) Report 350: Recommended Procedures for the Safety Performance Evaluation of Highway Features and begins to detail the most current evaluation criteria contained under the Manual for Assessing Safety Hardware, 2009 (MASH). For the most part, roadside hardware tested and accepted under older guidelines that are no longer applicable has not been excluded in this edition.
A copy of the February 2012 errata is included with the printed publication. The changes from this errata are incorporated directly into the download, eBook, and web-based versions. The errata can also be downloaded from the link below.
All sales in download, web-based, and eBook formats are final: there are no refunds on electronic items and eBooks cannot be exchanged for other formats. You must become an E-Affiliate to purchase any electronic format.
The download version is a single user downloadable PDF file. See the PDF Download User Guide for complete details.
Download Item System Requirements: Windows operating system, Adobe Reader. You will only be able to open this file while connected to the Internet.
This item is also available as a single-user, five-user, ten-user, or twenty-five-user web-based subscription document. The subscription is valid until this publication is superseded by a newer edition. This format offers web browser-based access and the ability to take and save notes. See the Web-Based Publication User Guide for complete details. For a free preview of these features, go to http://rsdg.digital.transportation.org and log in using your E-Affiliate e-mail address and password.
The single-user eBook is optimized for use on Apple, Android, or Windows tablets, and can also be viewed on and printed from Windows, Macintosh, or Linux computers. To avoid serious limitations on your future ability to transfer this publication between devices, you must authorize your e-reader software with an Adobe ID before you download this document. See the AASHTO Electronic Publications User Guide for details.
The Roadside Safety Analysis Program (RSAP) version 3.0.0 is a software tool for performing benefit-cost analyses as discussed in Chapter 2 of the 2011 Roadside Design Guide. The program is a macro-enabled MS Excel workbook that guides the user through the process of specifying alternative roadside designs and estimating the frequency and severity of crashes for each alternative. It can be downloaded from http://rsap.roadsafellc.com.
A video describing the changes from the third edition can be viewed here.