The average price of a gallon of regular unleaded gasoline is now $3.52 - up 15 cents from one week ago.

The current price is up 35 cents from two weeks ago, and 72 cents compared to the same time last year.

The price of gas is rising so fast, many stations are changing their signs out at the street every day. And consumers are feeling the pain when they stop to fill up.

"I was really shocked, when it didn't stop until $68.04," said motorist Autumn Geist-Lombardo.

Although gas prices are expensive everywhere, some stations sell it for much less than others. For example, in West Covina, Calif., a mobile station was selling gas at 4.89 a gallon, but directly across the street, a Shell station was nearly a dollar cheaper.

"I noticed right across the street it is about a dollar difference and I had to come over and take advantage of a dollar difference," said E. J. Adams.

Savvy consumers should compare prices because experts say it really pays to shop around for the best deal.

"It certainly does. When prices are rising, some stations have already raised their prices. And some stations are a little bit slow to raise their prices. So it certainly can pay off very much so," Gasbuddy.com's Patrick Dehaan said.

Generally, gasoline is more expensive at stations near highways, in wealthy neighborhoods and near airports, where people are in a hurry to return rental cars. So avoid those areas.

For more specific help, there are websites, like GasBuddy.com, that could lead you to the cheapest gas prices in your area. And yes, they even have an ap for that.

In order to make up for skyrocketing gas prices, consumers are modifying their driving habits.

Drivers also report they are putting off or consolidating their errands to make fewer and more efficient trips.