You are here:Archives > March 2010 > NREL Gap Analysis NREL Gap Analysis Karen Hall, National Hydrogen Association The National Renewable Energy Laboratory (NREL) has published a new report entitled: Vehicle Codes and Standards: Overview and Gap Analysis. The report covers six alternative fuels in an effort to provide a coordinated approach to alternative fuel vehicle technologies codes and standards. The six fuels covered are: Biodiesel Natural Gas (NG) Electricity Ethanol Hydrogen Propane The report is available online at http://www.nrel.gov/docs/fy10osti/47336.pdf.