Following last week's jump in the price of diesel, trucking's main fuel fell half a cent this week

, according to figures released by the Department of Energy's Energy Information Administration.

Last week, diesel was up 3.3 cents to a national average of $2.961 a gallon. Prior to the increase, diesel prices had dropped 19.9 cents over five straight weeks. This week, diesel took a slight tumble to land at a national average of $2.956 a gallon. This week's price is 34.8 cents higher than the same week last year.

The West Coast and Central Atlantic regions saw the highest prices this week, at $3.099 and $3.091 a gallon, respectively. Meanwhile, prices were lowest in the Gulf Coast and Lower Atlantic regions, where it averaged $2.893 and $2.919 a gallon, respectively.

Gasoline was up 1.4 cents to a national average of $2.757 a gallon. Prices are expected to continue to rise, as vacationers hit the roads for the summer, according to reports by the Associated Press.

While crude oil rose Friday on a weaker U.S. dollar and concerns that a hurricane was heading into the Gulf of Mexico, prices went down Monday after investors found out the storm would steer clear of the Gulf area, the AP reports. Crude dropped 61 cents to close out trading Monday at $78.25 a barrel on the New York Mercantile Exchange, the AP says.