Other Transportation Fuels Information on other transportation fuels: current market, programs, incentives, and resources to learn more. Learn about Other Transportation Fuels Do you have questions about natural gas, propane, or hydrogen? Want to learn about the benefits, impacts, and facts? Click here to view our answers to some common questions about other transportation fuels. Programs & Incentives Do you have questions about natural gas, propane, or hydrogen? Want to learn about the benefits, impacts, and facts? Click here to view our answers to some common questions about other alternative transportation fuels. Currently no programs are available for alternative transportation fuels. State of Rhode Island Office of Energy Resources