Sometimes I wonder what in the world can one person do to make a difference. Then I come across a railroad crossing and it's flashing. Granted many crossings have the mechanical arms that barricade the road to ward of drivers of the dangers, but there are still several that are only notifying drivers of trains' crossings by the flash of a tiny light. Something as simple as a flashing light can save a life, can make that difference. What is your flashing light? What is that simple thing you can do to make a difference?