Q: What is the law about mounting a flashing warning light on my pickup that I use to plow snow? I need to plow well beyond at the end of our driveway, as the plows can make quite a ridge of snow when ...

A state trooper behind a bush. A possum in the street. A bicyclist on a busy roadway. All are day-or-night, rain-or-shine scenarios where a flash of headlights could warn another driver to watch out ...