TRB’s Transit Cooperative Research Program (TCRP) Synthesis 1: Safe Operating Procedures for Alternative Fuel Buses includes information on the use of methanol, ethanol, compressed natural gas (CNG), liquefied petroleum gas (LPG), liquefied natural gas (LNG), and other alternative fuels for buses. This topic is published at https://www.trb.org/news/blurb_detail.asp?id=2460