Behind the data
How Rovee's routing and rules data works
Rovee builds its routing and rules data from official government and toll-operator pages across 28 European countries (27 in the EU plus Switzerland), plus curated public sources for campsites and aires. Every country rule carries a link to its official source and a review date. Routing is built around the size you enter — height, width, length, and weight — not a car's. Nothing here is estimated from a marketing brochure.
A navigation app is only as trustworthy as the data underneath it. This page explains where Rovee's numbers come from, how we keep them current, and — just as important — what we don't claim. No black box, no invented precision.
In short
- Official sources first
- Toll, vignette, and low-emission-zone rules come from the official government or toll-operator page for each of 28 European countries — not scraped from forums or other apps.
- A source link per rule
- Every country rule stores the official page it came from and the date it was last checked, so a claim can always be traced back to where it started.
- Reviewed on a schedule
- Rules carry a review-due date and are re-checked against their official source at least once a year, and sooner when a country announces a change.
- Routing built around your size
- Heights up to 4.0 m, widths up to 2.5 m, lengths up to 12 m, and weights up to 7.5 T are factored into the route — the path is built for your rig, not the shortest line for a car.
- Kept current
- The curated campsite and aire dataset is refreshed weekly from public sources, and route and road alerts arrive in real time while you drive.
Where the data comes from
Every country rule in Rovee starts at an official source — the government ministry, road authority, or toll operator responsible for that rule. We don't copy rules from other navigation apps, and we don't treat a forum post as a source. A forum thread might tell us where to look; the number itself comes from the official page.
Across those covered countries, that means pages like Austria's ASFINAG, Switzerland's Federal Office for Customs, Slovenia's DARS, Germany's Toll Collect, France's Crit'Air service — plus, for the UK, Transport for London for the Ultra Low Emission Zone (ULEZ). For campsites and overnight aires, we compile a curated dataset from public sources — municipal aire registers, motorway service-area listings, and campsite associations.
How every rule is tracked
Behind each country sits a structured record, not a paragraph of prose. For every rule we store the official source URL it came from, the date it was last checked, and the date it is next due for review. When a rule has a weight threshold — the point where a light motorhome and a heavy one follow different systems — both sides are stored separately, so a 3.2-tonne van and a 4.5-tonne rig get the answer that actually applies to them.
That structure is what lets Rovee show you the source instead of asking you to take our word for it. It also means a correction has one place to live: fix the record, and every route, warning, and estimate that reads from it updates together.
How routing uses your size
You enter your rig's height, width, length, and weight once, and the route is built around them. Rovee routes for heights up to 4.0 m, widths up to 2.5 m, lengths up to 12 m, and weights up to 7.5 T. Bridge and tunnel clearance, narrow lanes, and weight-limited roads are factored into the path — not applied as an afterthought filter once the car route is already drawn. To prepare those measurements, see how to read your rig's dimensions; the same data drives the toll-cost prediction and the low-emission-zone alerts on the route ahead.
Roads are mapped at street level across the 28 covered countries. What Rovee does is match the road to your dimensions: the path that fits your rig, rather than the shortest line a car could take. It won't suggest a U-turn your rig can't physically make.
How current it stays
Rules change, and stale data is worse than no data. Two things keep Rovee current. The curated campsite and aire dataset is refreshed weekly from its public sources, so an overnight spot that closed last month doesn't strand you. And while you drive, route and road alerts arrive in real time — a warning reaches you before a zone, while you can still turn.
Country rules sit on a slower, deliberate cycle: each is re-checked against its official source on its review date, and sooner when a country announces a change. When a rule was last verified is part of its record, not a guess.
What we don't claim
Trust also means being clear about the limits. Rovee combines official sources with curated data, but local rules and conditions change, sometimes overnight and sometimes without notice. A few things we deliberately do not claim:
- We don't promise you'll never get a fine. We surface the rules and warn ahead of zones; the road signs and local regulations in front of you are always the final word.
- We don't give legal or tax advice. Toll classes, vignette categories, and emission-zone rules are described as we find them on official pages, not as instructions for your specific situation.
- We don't invent precision we don't have. Where a figure is an estimate — a likely trip cost, for example — it's presented as an estimate, not a guarantee.
For anything critical to your trip, confirm it with the official source — which, because we store the link, is one tap away.
Common questions
Where do the toll and vignette prices come from?
From the official toll operator or government page for each country — for example ASFINAG in Austria, DARS in Slovenia, or the national vignette service. Each price is stored with the source page it was taken from and the date it was last checked.
How often is the data updated?
The curated campsite and aire dataset is refreshed weekly. Country rules are re-checked against their official source on a review schedule — at least yearly, and sooner when a country announces a change. Route and road alerts update in real time as you drive.
Does Rovee guarantee I won't be fined?
No, and any app that promises that is overpromising. Rovee surfaces the rules and warns you ahead of zones and restrictions, but road signs and local regulations are always the final authority. Treat the app as a well-sourced heads-up, not a legal guarantee.
How does Rovee route around my motorhome's size?
You enter your height, width, length, and weight once. Rovee routes for heights up to 4.0 m, widths up to 2.5 m, lengths up to 12 m, and weights up to 7.5 T, factoring bridge clearance, lane width, and weight limits into the path rather than filtering a car route after the fact.
Want to see the data in action? The free Rovee toll calculator reads from the same sourced records — tolls, vignettes, and zones for a route, in one total. No sign-up.
And if you want the app to warn you before each zone while you drive, on CarPlay: join the waitlist. 1,000 founding places, €17.99/year founding price.