Following a summer of higher gas prices, pump prices are expected to decline this fall. Radio PA's Mark Sims reports. Decreased demand for gas and stable crude oil prices are expected to contribute to a decrease in gas prices. Triple-A Mid-Atlantic spokesperson Jana Tidwell says the switchover from the summer to the winter blend of gasoline will also help to drive down prices at the pump. However, Tidwell says crude market volatility or a hurricane which shuts down major refineries would send gas prices up.