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.

Originally published in 1973 and based on papers published in The International Journal of Environmental Studies, this book discusses the impact of road vehicles on the environment. Particular stress is laid on the design of towns and vehicles, economic problems associated with these, the responsibility of planners and the integration of transport planning and environmental planning at local, regional and national levels. Subsequent sections cover the science of accident research and legislation, particularly dealing with global pollution control. Many of the problems discussed remain as pressing today as when this book was first published.