For courses in Traffic Enforcement and Crash Investigation. The first of its kind, this book presents comprehensive traffic related material that new police officers need to know. From the history of traffic laws to future trends, it helps officers understand the basic elements of traffic enforcement and crash investigation. Beyond just a traffic law manual, it includes social and ethical issues and hot topics such as dealing with official misconduct, quotas, tolerances and officer discretion. Its strong coverage of DUIs and up-to-date guidelines help prepare officers for one of their primary responsibilities: traffic enforcement, DUI enforcement and crash related investigations.