Reports
Reports gives you two things for the period and group chosen in the filters: a monthly table to download, and a summary paragraph written from the same numbers.
The monthly and quarterly tables
A CSV file, one row per calendar month, or per quarter with Quarterly (a partial month or quarter at either end of the period covers only the days inside it). The columns:
| Column | Meaning |
|---|---|
| period | The calendar month (YYYY-MM) or quarter (YYYY-Q1) |
| source | verified for this platform's figures; commutehub (self-reported) for the history rows below them |
| enrolled | Participants who had joined by the end of the month |
| new_participants | Participants who joined during the month |
| active | Participants who recorded at least one trip that month |
| sharing | Participants with at least one shared trip that month |
| journeys | All trips recorded, shared or not |
| shared_journeys | Trips that were verified as shared |
| share_rate | shared_journeys ÷ journeys |
| shared_vehicle_trips | Distinct vehicles on a road carrying two or more participants |
| vehicle_trips_avoided | Car trips avoided (see the method below) |
| miles_avoided | Miles not driven |
| co2_kg_avoided | Kilograms of CO₂ avoided |
| gallons_saved | Gallons of fuel saved |
| fuel_dollars_saved | Gallons saved × EIA's average Rocky Mountain gasoline price for the period, or the price set in Program settings |
| driving_cost_saved | Miles avoided × the cost per mile in Program settings (the IRS standard mileage rate, say); blank until one is set |
| average_occupancy | Participants per shared vehicle trip |
| rewards_earned | Participants who reached the reward threshold that month |
| self_reported_trips | Trips participants typed or logged on the web, counted apart |
| self_reported_miles | Their miles |
Definitions match the Overview; see Your dashboard explained.
History from CommuteHub
Reports → Before this platform keeps CommuteHub's
monthly figures (participants, trips, miles, CO₂) as their own series.
Add them from a CSV whose first row names month (YYYY-MM)
and any of participants, trips,
miles, co2_kg; importing a month again
replaces it. They appear at the end of the downloaded table, labelled
self-reported, and are never added to verified figures. Verified numbers
usually look smaller than the old ones: CommuteHub counted what people
logged, including trips nobody could check, and this platform counts
only shared trips both phones recorded.
The summary paragraph
A ready-to-edit paragraph stating the period's participation, shared trips, avoided driving and emissions, and that every trip was verified automatically. Copy puts it on your clipboard.
The method
Wording you can use in a report:
Shared trips are verified automatically: each participant's phone records their drive on the corridor roads, and a trip counts as shared only when two or more participants' recordings show them in the same vehicle for the drive. Car trips avoided count each shared vehicle trip carrying n participants as n − 1 trips that would otherwise have been driven alone. Miles avoided multiply that by the recorded road distance. CO₂ uses the EPA's estimate of about 400 grams per mile for a typical passenger vehicle, and fuel savings assume 25 miles per gallon.
The main assumption is the counterfactual: that participants in a carpool would otherwise have driven alone. Some would have taken Skyline or not travelled, so the avoided figures are an upper estimate of that kind. The trip counts themselves are measured, not estimated.