I have talked before about AAA's ability to collect data on a variety of items and use it to create useful polls and statistics. Being a national organization with contractors in most parts of every state, AAA can easily get information about gas prices. They simply send out an e-mail or phone call to contractors to report in the price of gas. Most contractors and towing companies are part of a gasoline chain.
They can use this to create a map of gasoline prices from a county, state and national level. They can figure out averages and find out where gas prices are highest and lowest. People can then use that information when deciding on gasoline.
If you know that BP gas companies in most states are 10 cents higher per gallon than most others, then you don't have to drive to the other end of time to use them. If you state has the highest gas prices, then you know that you're not the only one getting hammered at the pump. AAA provides an important serivce to its customers, journalists and the general public by tracking and reporting on gas prices.