Indianapolis Public Transit Corporation (IndyGo) has added two hybrid electric buses to its fleet. These models are manufactured by Gillig, and are powered by the GM-Allison hybrid drive in combination with a Cummins 5.9-liter diesel.

The buses will begin servicing the city on February 1.

In August 2003, IndyGo put five eBus series hybrid buses into service. The generators for the eBus series hybrids are driven by Capstone microturbines burning a B20 biodiesel blend.