IC Corporation manufactures a line of diesel electric hybrid school buses [1] and "people mover [2]" buses.

There are two versions of the school bus. The "charge sustaining" type uses a lead-acid battery based electric motor along with the diesel engine for a 20% to 50% improvement in mileage. The "charge depletion" is a "plug-in" hybrid that uses lithium-ion batteries and achieves up to 70% improvement during the first 70 miles of a route, falling back to 20% to 50% improvement over the rest of the run.

One of their people mover hybrids was recently placed on loan to the Denali National Park [3] in Alaska for testing.