The goal of this unique book is to give the reader a thorough understanding of speed enforcement concepts along with the devices that measure speed and, by means of interesting applications, to prepare them for their implementation in their professional careers. The text starts with a basis for the concept of speed in scientific terms and explores the concepts of speed as they relate to energy and work. The book also investigates both the negative and positive effects that various speeds have on travel and addresses the methodology to determining speed limits. Fundamental to the book are the devices used to measure speed. From the basic concepts of time distance determination through instant speed detection devices such as speed radars and speed lasers, the reader will explore the historical developments, scientific principles, and operational considerations of these devices. These sections are presented in depth with helpful charts and illustrations to assist understanding. The information is presented in easy to understand language to aid the reader in gaining a full grasp of both the scientific and operational differences of each technology along with the operative limitations associated with these technologies. Additionally, the book discusses the concept of voluntary speed compliance and the associated methods of achieving that. Further, the text reviews the elements needed for court scrutiny and acceptance of both speed law violations and the instruments used to measure those speeds and offers actual case examples that emphasize major legal points. The book is written with quantities and units in both U.S. and metric measure. This text is the most up-to-date and comprehensive resource concerning all methods used to monitor and enforce speed laws and is an ideal asset for traffic management courses.