TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 336: Road Safety Audits examines the state of the practice of road safety audit (RSA) and road safety audit review applications for U.S. states and Canadian provinces. This synthesis also reviews international RSA practices.  RSAs were first introduced in the United Kingdom more than 20 years ago and have been applied in New Zealand and Australia since the 1990s.  This topic is published at https://www.trb.org/news/blurb_detail.asp?id=4477