That gas prices are too low in the US (in part due to the excise tax not being adjusted for inflation), and these prices will make people more aware of the fuel-consumption of their cars, and of alternatives (ride-sharing, mass-transit, hybrids, electric, moving, etc).
For comparison the prices in many countries in the EU are at least 30% higher.
Yes, I understand that this is unpopular and adapting to higher gas prices will be painful.