This book investigates the complex relationship between the design speed of roadways, the actual operating speeds of vehicles, and the posted speed limits, aiming to reconcile discrepancies and improve traffic safety.

This book is recognized within the traffic engineering community as a foundational text that critically examines the discrepancies between theoretical design speeds, actual vehicle operating speeds, and legally posted speed limits. It is valued for its data-driven approach and its efforts to provide a cohesive framework for understanding and managing road speeds. The work is likely to be of significant interest to traffic engineers, transportation planners, and safety researchers seeking to improve roadway design and traffic management strategies.