lawmen wrote: Law is so vast its not really possible to know everything even if one is a cop. Most people exect cops to know everything, though. .

Got that right....not just a simple ticket book and out onto the road. Carry at least a duty bag (small suitcase) packed with variety of books to look up laws, maps, reports, etc...if I want to branch off for a day into CMV enforcement add in another bankers box of stuff. Encompass this with an MWS (mobile work station) and then I can go on elaws at roadside!