Autobahn-Tempolimit
The A20 and its speed limit
The A20 is 345.2 km long. Of that, 316.9 km have no speed limit (91.8%) – here are the exact figures, the longest open stretch and where the limit applies.
The A20 in numbers
| Category | Length | Share as bar |
|---|---|---|
| Total length | 345.2 km | |
| no speed limit | 316.9 km | |
| fixed limit | 24.7 km | |
| no limit recorded | 3.6 km |
The longest open stretch
In one go without a limit you can drive up to 177.3 km on the A20 (per carriageway) – the longest continuous derestricted section of this Autobahn. On the interactive map you can follow exactly where the limit drops and where it returns.
Enter start and destination and see how much of your drive is open – and what that means for travel time.
How the figures are produced
The basis is our own analysis of the freely available OpenStreetMap data. For every section of the A20 we check whether a speed limit is recorded and sum the length by category. “No limit recorded” means the tag is missing in the data – which is not the same as open road. This is a data-based analysis, not an official survey.
Frequently asked questions
How much of the A20 has no speed limit?
316.9 km of the total 345.2 km, i.e. 91.8%. The remaining 28.3 km have a fixed limit, are gantry-controlled or have no recorded limit.
How long is the longest open stretch on the A20?
Up to 177.3 km in one go – the longest continuous derestricted section on the A20 (per carriageway).
Is the A20 completely derestricted?
No. While 91.8% is open, interchanges, junctions and roadworks carry a limit. No Autobahn is fully derestricted.
Data source: our own analysis of OpenStreetMap speed limits, as of 29 August 2026. Kilometres averaged per carriageway. Not an official survey.