Last updated: 18 August 2026
This page lists everything Vaut le Détour stores on or reads from your device. The site uses no advertising cookie and no third-party tracker: the only files stored are ours, and only one of them is a cookie in the technical sense.
Strictly necessary cookie.
| Name | What it does | Lifetime |
|---|---|---|
vld_session | Keeps you signed in after you click your sign-in link. Set only if you have an account. Not readable by JavaScript (HttpOnly), sent over HTTPS only. | 60 days |
This cookie is essential to the account working: it does not require prior consent, and refusing it would mean not being able to sign in.
Audience measurement, after you agree. If you accept in the banner, each page view sends us the page viewed, the page you came from and the device family (mobile or desktop). This measurement sets no cookie. Your visit is counted under an identifier obtained by hashing your IP address with the current date and a secret key: it changes every night and allows neither following you from one day to the next nor linking you to your account. If you refuse, nothing is sent.
Matomo, our measurement tool. Since 21 August 2026, pages load Matomo once you have accepted audience measurement. It runs on our servers, without cookies, and your IP address is stripped of its last two bytes. It does read a few browser characteristics, such as screen size: that is why we ask before loading anything. The mesure_audience key keeps your answer on your device, and counts as the same answer as vld_cookies, so the question is not put to you twice.
What we keep in your browser's local storage. These are not cookies: nothing is sent to our servers, everything stays on your device and disappears if you clear the site's data.
| Key | What it does | Lifetime |
|---|---|---|
vld_cookies | Your answer to the banner, so we stop asking. | Until cleared |
vld_lang | The language you chose (French or English). | Until cleared |
vld_crew, vld_form | Your travelling party and your last search, to prefill the planner. | Until cleared |
vld_compo, vld_pending, vld_pending2 | The route you are composing, so reloading the page does not lose it. | Until cleared |
vld_detours | "Validated detours" recorded offline, waiting to be sent. | Until sent |
vld_audio, vld_notifguide, vld_securite | Your audio and notification settings, and whether the road-safety reminder has already been shown to you. | Until cleared |
vld_prov | How you first arrived (shared link, social network, search engine). Attached to your account if you create one, so we know what makes the service known. | Until cleared |
vld_dev | Debug mode, switched on by hand during testing. | Until cleared |
vld_geo_consent, vld_hello | For the lifetime of a tab only: avoiding recording your location consent twice, and showing the welcome message once. | When the tab closes |
Changing your mind. Clear the site's data in your browser (settings, then privacy or site data): the banner will reappear on your next visit and you can answer differently. You may also refuse or delete cookies from your browser settings; since the session cookie is needed to sign in, deleting it signs you out.
Third-party services. No library, font or script is loaded from a third-party service: everything is served from our servers. Two exceptions, with no cookie and no identifier: map tiles come from OpenStreetMap, and a place photo may be served by Wikimedia the first time it is displayed. When you click through to a booking partner, its site takes over, with its own trackers and its own policy.
The corresponding processing is described in the privacy policy.