Autobahn-Tempolimit
The A3 and its speed limit
The A3 runs from Emmerich to Passau and is 765.3 km long. Of that, 500 km have no speed limit (65.3%) – here are the exact figures, the longest open stretch and where the limit applies.
Route of the A3
The A3 runs from Emmerich to Passau.
Along the way it links Oberhausen, Duisburg, Köln, Frankfurt am Main, Würzburg, Nürnberg and Regensburg.
Major motorway interchanges along the route include Kreuz Oberhausen, Kreuz Nürnberg and Kreuz Biebelried.
The A3 in numbers
| Category | Length | Share as bar |
|---|---|---|
| Total length | 765.3 km | |
| no speed limit | 500 km | |
| fixed limit | 138.9 km | |
| variable (gantry) | 89.2 km | |
| no limit recorded | 29.7 km |
The longest open stretch
In one go without a limit you can drive up to 70.9 km on the A3 (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 A3 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
Which cities lie on the A3?
The A3 runs from Emmerich to Passau and passes, among others, Oberhausen, Duisburg, Köln, Frankfurt am Main, Würzburg, Nürnberg and Regensburg.
How much of the A3 has no speed limit?
500 km of the total 765.3 km, i.e. 65.3%. The remaining 265.3 km have a fixed limit, are gantry-controlled or have no recorded limit.
How long is the longest open stretch on the A3?
Up to 70.9 km in one go – the longest continuous derestricted section on the A3 (per carriageway).
Does the A3 have variable speed limits?
Yes, about 89.2 km of the A3 are controlled by overhead gantries. There a limit can be shown even where the road is otherwise open.
Data source: our own analysis of OpenStreetMap speed limits, as of 22 September 2026. Kilometres averaged per carriageway. Not an official survey.