Your project was not identified as multi-unit residential or commercial, so both scenarios will be discussed. The cited CIR rulings are applicable only to multi-unit residential settings. Refer to the SSc4.3 ruling dated 1/26/05 addressing office buildings (applicable to SSc4.3 only), which also contains updated data for calculations in either setting. The use of a car share program\'s efficient gas/electric hybrid vehicles to meet the requirements for SSc4.3 and the carpool requirements of SSc4.4 is acceptable for multi-unit residential projects provided the requirements, as stated in the cited CIRs, are met and appropriate documentation is provided. This approach to the carpool option is not applicable to commercial buildings.