USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Site Notification

Site Notification

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation
FHWA Highway Safety Programs

AASHTO Guidance

American Association of Highway and Transportation Officials (AASHTO) is a nonprofit association that represents highway and transportation departments across the nation and serves as a liaison between State departments of transportation and the Federal government. AASHTO works to educate the public and key decision makers about the critical role that transportation plays in securing a good quality of life and sound economy for our nation, by setting design and installation standards, providing guidance and resources, and developing outreach materials.

Screenshot: Cover AASHTO's Roadside Desing Guide

AASHTO's Roadside Design Guide
presents a synthesis of current information and operating practices related to roadside safety and focuses on safety treatments that can minimize the likelihood of serious injuries when a motorist leaves the roadway.

  Screenshot: Cover of Manual for Assessing Safety Hardware (MASH) Manual for Assessing Safety Hardware (MASH) presents uniform guidelines for crash testing permanent and temporary highway safety features and recommends evaluation criteria to assess test results.
Last updated: Tuesday, August 11, 2020