There's no vignette — autoroutes charge by the kilometre at the barrier or via free-flow cameras. Two separate stickers matter instead: Crit'Air for city low-emission zones, and winter equipment if your route touches one of 34 mountain departments.
A free-flow gantry has no barrier to stop at — you register a payment method online within days or a fine follows.
The sticker classes your vehicle 0–5 by emissions; some zones ban the oldest classes outright on bad-air days.
It's a physical windscreen sticker by post — ordering it the morning you arrive is too late.
Signposted at the department boundary — easy to drive past without noticing you've entered one.
The lower wet-weather limit applies automatically in rain, not just when signed.
Direct lines skip the general dispatcher if you already know which service you need.