Method note
Territories, nordic areas and resorts
A carpooling page covering your whole area, and an end-of-season report built to be compared with next season's.
Version of 2 October 2026. Supersedes the version of 18 September.
The nine questions your report answers
- Where those who carpool to your sites come from, town by town.
- Which sites draw which catchment areas, and at which points in the season.
- How they state they would have travelled without carpooling.
- How many stated they found their carpool.
- Which distribution points produced the listings, and which produced none.
- Where demand was expressed without any offer to meet it.
- What your visitors say about it, in their own words.
- How many journeys took place, confirmed by the carpoolers themselves.
- What share of your carpoolers stayed overnight on site.
For an event, the report answers the same nine questions. Two of them change: when participants get organised relative to race day, and how many listings led to a contact request, in place of the sites and the distribution points.
What you receive
A page in your colours, with your logo, your partners and the season's competitions, bringing all your sites together at a single address. Haute-Savoie Nordic gathers its 21 nordic areas there.
Your visitors find someone to ride with in two clicks, with no account and no app. You have nothing to install, nothing to administer, and no data to supply to us: everything the report contains comes from the page.
The page is live three to five working days after the agreement, with its distribution links. The report is delivered to you within the month following the end of the season.
What the report lets you do
- Know where those who come to you travel from, site by site. The towns and catchment areas your carpoolers set out from, ranked by volume, and their share inside or outside your group of municipalities. Origin is recorded at the entry point, not just at the area. On an area with several access points, you see which one draws which catchment, and at which points in the season.
- Account for what you did about access. A document readable as it stands, that fits into an activity report, a council decision or a certification application. Every figure in it carries its base and its level of evidence.
- Know what to repeat next year. Every link placed on your materials carries its own marker. The report says what the QR code at the ticket desks, the newsletter, the registration email for your competitions and your website produced. A distribution point that produced nothing shows up too.
- Know where to push. Passenger listings left unanswered, and the visitors who left their address to be told as soon as a ride appears on a site where there was none. That is demand with no offer to meet it, site by site.
- Use your visitors' own words. An optional field collects a sentence about their carpool. Only those whose author has authorised the quotation appear in the report, anonymously.
What is observed, and at what level of evidence
Your visitors post a ride offer or join someone else's, voluntarily. Every item of data in the report carries one of these three levels.
- Declared when posting. The town of departure, asked of everyone, drivers and passengers. The entry point, the date, the direction of the listing and the seats offered. Then, after posting, two optional questions: how they would have travelled without carpooling, with four answers (driving alone, carpooling some other way, not by car, not coming), and the overnight stay (day trip, or staying on site).
- Observed on the page. Contact requests, when a visitor asks for the contact details of a listing's author. The declared carpool, when the author withdraws their listing and indicates they found one. The distribution point they arrived through. Alert requests on a site with no ride.
- Declared the next day. If the author agreed when posting, they receive a text message the next day, once only, with no reminder. Two questions: did the journey take place, and how many were in the car. Their answers are recorded as given.
The report is aggregated and anonymised. First name and phone number serve to connect visitors and to send the text message. They appear in no report. A town of departure with fewer than five listings is not published on its own: it is grouped with its group of municipalities.
Distance and CO₂ estimate
The distance of each listing is calculated by road route, from the centre of the town of departure to the centre of the site's town. It is stored one way, and the report doubles it. When the road route is not available, the straight-line distance is multiplied by 1.3. This coefficient is a MontioAlps convention, and the report states which listings rely on it.
From this the report derives the kilometres travelled together: the round-trip distance of the journeys confirmed by text message only, when the next-day text message is chosen. The distance and the CO₂ estimate are calculated from declared and observed data. The report marks them “Estimated”, a fourth level, distinct from the three above.
The CO₂ estimate covers only carpoolers who stated they would have come driving alone and, where the next-day text message is chosen, those whose journey is confirmed. Formula: sum of the round-trip distances of these carpoolers, multiplied by the emission factor of an average-engine passenger car, 0.25 kg CO₂e per vehicle-kilometre, ADEME Base Empreinte, item 43791, Base Carbone v23.11, uncertainty 60%. The version of the factor appears in every report.
The figure is always read with its base: “X kg of CO₂, estimated on n carpoolers stating they would have come driving alone, out of n respondents and n listings, journeys confirmed, ADEME factor 43791”. It is never called “CO₂ saved”.
The five limits of the method
- The distance is measured between town centres, not from home. In a large town, the gap can reach several kilometres.
- The journey is confirmed, not observed. A contact request says that a visitor asked for contact details. A confirmed journey says that its author answered “yes” the next day. MontioAlps verifies nothing on the road.
- The number of people on board is declared, not counted. It comes from the next-day text message, from respondents only. Inbound traffic to your sites is not measured.
- The CO₂ estimate remains an estimate. A statement, an approximate distance, a factor for which ADEME gives 60% uncertainty. It is quoted with its base, never on its own.
- The report describes those who carpooled, not all your visitors. Only those who use the page are represented, and the optional questions do not get 100% answers. The report shows its sample sizes and its response rate next to every figure. No figure is related to the total number of your visitors.
These limits are written here rather than discovered later. A figure whose base is known can be defended in front of an elected official.
From one season to the next
A survey is commissioned once and holds for a year. Here, four things do not move from one season to the next: the same set of sites, the same page, the same questions to the visitor, the same handling of the data.
With the method held constant, two seasons compare. Differences in origin, in volume and in timing become legible, and the actions taken between the two seasons can be related to them. The report compares your area with itself, never with another.
What drives the volume
The number of rides depends on how visible the page is at the moments when people decide to come. That is the only lever, and it is yours.
- The link on your access and practical-information pages.
- A QR code at reception and at the ticket desks.
- A mention in the newsletter and a reminder on social media ahead of busy periods.
- The link in the registration email for your competitions.
Each placement receives its own link, provided at the outset. A placement where the link provided was not used does not appear in the report. A first season's volume is not predicted. It is observed, and it serves as the reference for the next one.
Your data
You own the data collected on your page. You retrieve it at any time in a usable format, including if you do not renew. What you lose by leaving is the seasons compared at constant method, not your data.
They work with MontioAlps
Haute-Savoie Nordic, 21 nordic areas in Haute-Savoie.
The towns of Voiron and Chambéry, stage towns of the 2026 Tour de France.
Terms
Carpooling and the report form a single whole. It is a service, on quotation and purchase order. The price follows the number of sites covered and the level of evidence chosen: declared on the page, or confirmed by the next-day text message.
To see a page in service, open montioalps.com/HSN. For a quote, write to me.