Activity and definitions
Active participation means unique employees who completed at least one shared ride, divided by 240 eligible employees. Registrations alone are not participation. A ride is a completed one-way vehicle journey, counted once, rather than once per passenger. Cancelled rides are excluded. Shared kilometres are the common 20 km segment; collection detours are shown separately. This demo has one employee driver and one employee passenger on every ride.
Counterfactual and vehicle distance
For August, 360 passenger journeys × 70% who would drive alone × 20 km = 5,040 baseline vehicle-km displaced. Subtract 360 km of detours (1 km per completed ride), giving 4,680 estimated net vehicle-km avoided. The drivers are assumed to make their 20 km journeys regardless. Unknown and other modes receive zero baseline credit; all detours are still counted.
Emissions calculation and boundary
4,680 km × 0.180 kg CO₂-e/km = 842.4 kg CO₂-e (displayed in tonnes rounded to two decimal places). The illustrative factor represents operational vehicle emissions only; upstream fuel, vehicle manufacture and infrastructure are excluded. All vehicles use the same assumed factor. Actual factors vary by fuel, efficiency, vehicle technology and electricity region. No uncertainty range has been modelled.
For real reporting
Collect journey distances, occupancy, vehicle/fuel information, travel-mode responses, detours, period and coverage. Document factor source, year, units, geography, gases and boundary; match vehicle-km factors to vehicle-km and passenger-km factors to passenger-km. Apply a documented allocation method for mixed employee/public rides and avoid double-counting across groups. Protect personal journey details through agreed access, aggregation and retention rules.
Validate the method with your reporting team, include non-Herdy commuting, and report missing data and uncertainty. This prototype does not claim AASB S2 or GHG Protocol compliance, assurance, carbon credits or a complete Category 7 inventory.
Reference context: GHG Protocol Category 7 calculation guidance · Australian National Greenhouse Accounts Factors. These sources inform methodology discussions; neither endorses this demo or supplies its illustrative factor.