Tennessee’s Department of Transportation (TDOT) announced today that it is expanding its use of biodiesel into vehicles used in Nashville.

According to a release on TDOT’s web site, the agency has been using biodiesel for two years in a 130-vehicle test fleet in East Tennessee as part of the Pilot Fleet Program:

“It’s imperative that government and businesses begin identifying ways to improve air quality,” said TDOT Commissioner Gerald Nicely. “Using biodiesel is an effective way TDOT can reduce harmful emissions and protect our environment.”

TDOT is using B20… 20% biodiesel and 80% regular diesel fuel. Eighty-one heavy-duty dump trucks, bull dozers and back hoes are using the biodiesel.