On this site, the majority of occupants own flex cars (gas or ethanol), and vehicles use ethanol as fuel. Based on the CARB and California's "Alternative Fuel & Vehicle Technology Renewable" Program, ethanol is considered a renewable fuel. Is this acceptable for this credit?
Ethanol fueled vehicles can count towards as a portion of a qualifying alternative transportation trip equivalent to the percentage of ethanol that is in the ethanol fuel blend. The formula that must be used is (fuel ratio used*number of trips made during the week). For example, if an occupant uses the ethanol fuel blend E85 (85% ethanol, 15% gasoline) for all ten trips made to and from the project building during the week then 8.5 of the trips made would qualify as alternative transportation trips and 1.5 of the trips would count as trips made with a conventionally powered vehicle. In order to accurately account for the ethanol fuel blend the survey respondent must confirm that their flex vehicle is fueled with ethanol and provide the fuel blend.