Washington County Schools cut the ribbon on a state-of-the-art electric school bus this. It’s the first all-electric school bus in Tennessee.The all-electric school bus, which was built by Lion Electric, will reduce carbon emissions and save the school system money in fuel and maintenance costs. The electric bus is also significantly quieter than diesel buses – so much so, it plays a warning sound when traveling at a low rate of speed to alert pedestrians and cyclists to its presence according to officials.