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In 2007, Metro Transit purchased 5 hybrid-electric powered buses and became the first system in Wisconsin to add hybrid buses to its fleet.

In 2010, through funding provided by the American Recovery and Reinvestment Act (ARRA), Metro purchased 14 additional hybrids.

Metro now has 21 hybrids, which is 10% of its entire fleet.


Metro's hybrid buses are powered by the Allison Electric Drive system, which reduces exhaust emissions up to 90% compared to conventional combustion engines.

Up to a 60% improvement in fuel economy has been demonstrated in a vehicle with an Allison Electric Drive.


Forty percent of the energy to accelerate the bus is energy saved during regenerative braking.

When stopping or decelerating, vehicle energy is converted to electric energy and stored. In effect, the motor becomes a generator.

An Allison Hybrid Electric Drive System can significantly out-accelerate a vehicle equipped with a conventional drivetrain or an alternative fuel system.

King County Metro Test Program

King County Metro in Seattle Washington put Allison Electric Drive equipped New Flyer buses to an unprecedented test.

New buses were operated 36,000 miles in 120 days. Hybrid buses were then placed into fixed-route service. See the results!

Allison Electric Drive System -  EP System Familiarization

As explained by Bill Nye the Science Guy!

Learn more about the EP System, a parallel hybrid that blends both mechanical and electrical power paths to drive a vehicle.

By using a smaller internal combustion engine, and operating it only in its most efficient ranges, the EP System reduces fuel consumption and emissions and increases productivity and passenger comfort.

  • Play Video (EP System Familiarization....Featuring Bill Nye the Science Guy)

Metro Transit: (608) 266-4466; E-mail: