UPS is adding 200 new hybrid-electric delivery trucks that feature a 2-cylinder engine and E-GENTM chassis to its alternative fuel and advanced technology fleet.

The vehicles deliver approximately four times the fuel economy of a gasoline powered vehicle, and offer a real time telematics performance monitoring system that provides feedback for energy monitoring and route efficiency, according to UPS.

The trucks will be deployed sometime in January 2017 starting at locations in Arizona, Texas, Nevada, Mississippi, Alabama, Georgia, and Florida.

The technology in the trucks is the same used in the 125 vehicles UPS announced for its fleet in May this year, according to the package delivery company.

“The improvements in these new package cars came from real-world experience in our alternative fuel Rolling Laboratory, which earlier this year hit a 1 billion miles driven milestone,” said Mark Wallace, UPS senior vice president global engineering and sustainability.

The initial 125 vehicles were purchased under UPS’s commitment to log 1 billion miles with alternative fuel and advanced-technology vehicles, which it accomplished in August.