The national average retail diesel price fell 5.3 cents to $4.004 for the week ended Monday, May 14.
A week after diesel prices dipped for the first time in nine weeks, the national average price of diesel rose once again.
The national average retail diesel price dipped one-half cent to $4.142 per gallon.
The Department of Energy is promoting development and use of alternative fuels and powertrain technologies.
Since Oct. 10, the national average price of diesel has climbed 26.6 cents a gallon.
The Linoln, Neb., travel center is one of a planned 50 truck stops to add electrification under a federal program.
Volvo and Mack Trucks will team to improve the freight-moving efficiency of heavy-duty trucks and reduce greenhouse gases.
Since May 2 the national average price has fallen 23.6 cents and is at its lowest level since March 7.
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