The City of Denver has added four Freightliner Business Class M2 106 Hybrid trucks to its fleet of more than 1,900 vehicles and pieces of equipment.

These aerial bucket trucks will be used for forestry, traffic signal and traffic sign repair.

"The Freightliner trucks mark our entry into medium-duty hybrid use, and are a welcome addition to our fleet," said Ernie Ivy, fleet director, City and County of Denver. "With the new trucks, we will improve the way we deliver services to the citizens."

The Freightliner Business Class M2 106 Hybrid features the Eaton Hybrid Electric parallel drivetrain system that enables the truck to operate using the diesel engine alone, or in combination with the hybrid electric motor. According to Freightliner, this provides additional power to launch the vehicle and improve fuel economy in stop-and-go operations. The system also reduces emissions and operating noise.

"We operate in neighborhoods all around Denver, so our goal is to reduce pollution and noise in the places where we live and work," said Ivy. "The trucks also further our efforts to decrease greenhouse gas emissions and petroleum use."

Denver is receiving grants for the hybrid purchases; the city expects to achieve a payback in five to seven years through increased fuel economy and lowered maintenance expenses.

The truck also claims easy maneuverability, with a wheel cut up to 55 degrees, a broad windshield for enhanced visibility and a roomy and comfortable interior, Freightliner said.