Easy to use Handbook of Driving Rules for Illinois state, but could be applicable to other states. Intuitive search at top level by chapters, as well as within each chapter with highlights of any found keywords after any key pressed. You may go to next found results or go back by simply using left/right arrows as many times as you wish.
i.e.: Forgot what distance required to fire hydrant while parking? Easy! Just lookup "fire hyd", and you find it in seconds!