Not only can the effects of lower gas prices on the total number of miles driven be experienced on your way to work , they can also be understood by recognizing a simple cause and effect relationship: as gas prices decrease, people are more inclined to drive, whether that be a spring break road trip or a painstaking visit to a long-distance relative that hasn't been seen in a while. This relationship goes one step further; as miles increase, so too does the necessary number of car repairs.