Officers who train rookie cops will sometimes give them a location test. At night, the newbie is told to drive to a rural area where there are few lights. They’re told to pull over and turn off the patrol car’s lights. The trainer asks, “where are we?” Knowing can be a matter of life or death if cops need help. You, too, should pay attention to your location when driving. The knowledge can be critical if you need to call 911 from your cellphone.