370169 05: Cars line up to buy discounted gas May 26, 2000 at a Citgo gas station in Woburn, MA. Many consumers flocked to this station which offered special low prices for six hours before raising prices for the Memorial Day weekend. (Photo by Darren McCollester/Newsmakers)

Gasoline Price: $1.56

Change from the previous year: $0.34


388930 01: Traffic jams up trying to enter the 110 freeway, May 7, 2001, in downtown Los Angeles, CA. The Texas Tranportation Institute annual report on congestion has declared that Angelenos have the worst traffic congestion of 68 urban areas, spending an average of 56 hours per year sitting in traffic. The national average of 36 hours has more than tripled since 1982. California has three cities in the top five. (Photo by David McNew/Newsmakers)

Gasoline Price: $1.53

Change from the previous year: $-0.03


405809 01: Traffic builds earlier than normal on Interstate 495 May 24, 2002 near Silver Spring, MD. Due to lingering fears over air travel and lower gas prices than this time last year, heavy traffic is expected to clog the nation's highways during the three day Memorial Day weekend. (Photo by Stefan Zaklin/Getty Images)

Gasoline Price: $1.44

Change from the previous year: $-0.09


LOS ANGELES - MARCH 25: Gas prices remain high as a giant American flag hangs in the background on the ARCO refinery, a site of concern for a possible terrorist attack, in a show of patriotism March 25, 2003 in the Los Angeles, California community of Carson. California gas prices, the nation's highest, remain well above $2 a gallon, even as crude prices plummet, a factor fueling reported concerns over a possible recession. (Photo by David McNew/Getty Images)

Gasoline Price: $1.64

Change from the previous year: $0.20


Glendale, UNITED STATES: (FILES) This 26 March, 2004 file image shows gasoline delivery truck driver Robert Clark preparing to fill the underground gas tanks at a Shell station in Glendale, California. Oil prices reached record high points 08 August 2005 on supply concerns after an unspecified threat caused the United States to shut its embassy in Saudi Arabia -- the world's biggest exporter of crude, analysts said. AFP PHOTO / FILES/Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

Gasoline Price: $1.92

Change from the previous year: $0.28


SAN FRANCISCO - AUGUST 16: Daniel Sherman pumps gasoline into his car at a Chevron filling station August 16, 2005 in San Francisco, California. Retail gasoline prices rose 18.2 cents to a record national average of $2.55 a gallon, the biggest weekly jump since August 1990. Prices are expected to continue to rise through early September as high crude oil prices are passed on to motorists. (Photo by Justin Sullivan/Getty Images)

Gasoline Price: $2.34

Change from the previous year: $0.42


MIAMI - JULY 18: Charlie Sanchez fills his tank at a gas station July 18, 2006 in Miami, Florida. Across the country, the average price of regular unleaded gasoline is now $2.98 a gallon, according to American Automobile Association. (Photo by Joe Raedle/Getty Images)

Gasoline Price: $2.63

Change from the previous year: $0.29


WRAY, COLORADO -JUNE 27: A man drives a vintage automobile down a highway June 27, 2007 in Wray,Colorado. When rural America was chronicled 50 years ago by Jack Kerouac in his autobiographical novel 'On the Road', it was an America full of promise and economic potential, where the majestic openness of the land was entwined with the cult of the automobile. Today, partly due to the loss of the independent family farm, rural America is a state of economic and demographic decline. Despite these changes since Kerouac and his friends sped across the vast American night, much of the visual landscape of the rural United States has remained the same. (Photo by Spencer Platt/Getty Images)

Gasoline Price: $2.85

Change from the previous year: $0.22


TAFT, CA - JULY 21: An oil rig south of town extracts crude on July 21, 2008 in Taft, California. Hemmed in by the richest oil fields in California, the oil town of 6,700 with a stagnated economy and little room to expand has hatched an ambitious plan to annex vast expanses of land reaching eastward to Interstate 5, 18 miles away, and take over various poor unincorporated communities to triple its population to around 20,000. With the price as light sweet crude at record high prices, Chevron and other companies are scrambling to drill new wells and reopen old wells once considered unprofitable. The renewed profits for oil men of Kern County, where more than 75 percent of all the oil produced in California flows, do not directly translate increased revenue for Taft. The Taft town council wants to cash in on the new oil boom with increased tax revenues from a NASCAR track and future developments near the freeway. In an earlier oil boom era, Taft was the site of the 1910 Lakeside Gusher, the biggest oil gusher ever seen in the US, which destroyed the derrick and sent 100,000 barrels a day into a lake of crude. (Photo by David McNew/Getty Images)

Gasoline Price: $3.32

Change from the previous year: $0.47


BANNING, CA - DECEMBER 8: Diesel trucks and cars travel the 10 freeway on December 8, 2009 near Banning, California. Sustained global warming shows no sign of letting up according to new analysis by the World Meteorological Organization made public at the climate talks in Copenhagen. Although global temperature fluctuates from year to year, overall the decade of the 2000s is likely the warmest decade in the past 150 years covered by the report. This decade is warmer than the 1990s which were warmer than the 1980s, and so on. The conclusion meshes with independent analysis by the National Climatic Data Center and NASA. (Photo by David McNew/Getty Images)

Gasoline Price: $2.40

Change from the previous year: $-0.92