Credit compliance using AVR as an alternative metric

I see some formal programs use “average vehicle ridership” (AVR) as an alternate metric. We are active participants with the Go Smart/Go Perks/Triangle Transit/Share The Ride program. In lieu of a survey, can we use AVR by monitoring the number of building occupants and divide by the number of vehicles in the parking lot at 10 am for 5 consecutive mornings and convert this to the RCCT value? This building offers many alternative commuting transportation options such as infrastructure, incentives and programs. Among them include secure bicycle storage and showers, free electric vehicle charging stations, preferred parking for fuel-efficient vehicles (ACEEE score 40+), non-financial incentives for using alternative transportation, a database to facilitate carpooling, and participates in a regional transportation plan to ensure building occupants’ needs are considered. Bottom line - is there any way to pursue this credit without a survey?