Propane is another alternative fuel that is also known as liquefied petroleum gas (LPG).  Propane is another fuel type that is widely used in fleet vehicles.  Southern California also has a built out network for propane fueling as well.

See the embedded map below for how to find a propane fueling station.

Resources for propane:

Transportation Energy Futures Series: Fuels – Alternative Fuel Infrastructure Expansion: Costs, Resources, Production Capacity, and Retail Availability for Low-Carbon Scenarios, Source: U.S. Department of Energy – Energy Efficiency & Renewable Energy

Case Study – Propane School Bus Fleets – August 2014, Source: U.S. Department of Energy, Energy Efficiency & Renewable Energy: Clean Cities

Propane Vehicles: Status, Challenges, and Opportunities; Source: Argonne National Laboratory, Energy Systems Division

2013 Propane Market Outlook: Assessment of Key Market Trends, Threats, and Opportunities Facing the Propane Industry Through 2020; Source: Propane Education and Research Council