MASH Related Memos

FHWA - Clarifications on Implementing the AASHTO 2016 Manual for Assessing Safety Hardware

May 9, 2018. This document is a compilation of all questions and answers (Q&A) that have been developed to clarify the intent of the 2016 edition of the Manual for Assessing Safety Hardware (MASH) and to apply MASH. Also, to assist manufacturers, crash test laboratories, and transportation agencies in implementing the guidelines to develop and use roadside safety devices.