Liquid Propane Bus Information

Quick Facts About Greensburg Salem’s Transition To Liquid Propane Buses

  • DMJ Transportation, based in Mount Pleasant, was awarded 5-year contract
  • DMJ currently transports GS students to outside placement and alternative education sites

  • DMJ will purchase 24 liquid propane, 72-passenger buses
  • Liquid propane (LP), also known as propane autogas, is recognized as a clean alternative fuel by the 1990 Clean Air Act and National Energy Policy Act of 1992 and 2005
  • Mini-buses and vans will continue to use gasoline

  • The bus fleet will transition to liquid propane over the course of the 2017-2018 school year, with some 72-passenger LP busses starting in August



  • Lower operating cost
  • Some districts  and bus contractors have observed a  reduction in maintenance and fuel costs per mile
  • LP fuel is consistently less expensive than diesel
  • LP engines use less oil than diesel, require no additional filters, and no emission fluids

  • 50% quieter than diesel-powered buses
  • Drivers will be better able to hear passengers onboard and be alerted to emergency vehicles on the road
  • Propane tanks are 20 times more puncture resistant than gasoline or diesel tanks and have the lowest flammability of any alternative fuel
  • LP fuel will not expose students to dangerous particulate matter found in diesel exhaust known to aggravate asthma and breathing related issues

  • Students will have minimized exposure to diesel engine exhaust, a carcinogen with short- and long-term health effects

Other Benefits
  • Fuel does not gel in cooler temperatures like diesel fuel
  • Warm up more quickly, equaling less time to defrost windows and reduced fuel waste
  • Not subject to anti-idling restrictions due to low-emissions status
  • 90% of propane supplies are domestically produced, supporting U.S. jobs