Fuel costs play a key role in Marietta City Schools' decision to change its bus fleet. The district currently pays different rates for propane and diesel, with propane being the more affordable option. The school system has already started using propane buses, with 38 currently in operation.

These buses have several benefits, including quieter operation and lower maintenance needs. More information about the transition is available from the school system, including plans for expanding the use of propane-powered vehicles in the future.