No speed limit
38 km
of road with no fixed limit. Counting both directions separately, that's 76 km.
Autobahns › A 42
Around 38 km of the A 42 have no fixed speed limit, according to OpenStreetMap. Number 53 of 95 Autobahns.
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No speed limit
38 km
of road with no fixed limit. Counting both directions separately, that's 76 km.
Limited at times
1 km
A limit applies only at night, when wet or at set times.
Variable signs
1 km
Unrestricted only while the signs above the road are switched off.
Ranking
No. 53
of 95 Autobahns with unrestricted sections.
In parts. On around 38 km of the A 42 there is no fixed speed limit, according to OpenStreetMap. Towards Dortmund it's 40 km, towards Duisburg 36 km. On 1 km, variable signs set the speed. On the other sections, OpenStreetMap lists a speed limit or has no information. Even without a limit, the recommended speed of 130 km/h applies.
The data comes from OpenStreetMap and is updated several times a day, most recently on 10 October 2026. Roadworks and temporary limits are not included. Road signs always take priority.
Continuous stretches with no speed limit of one kilometre or more, in driving order. Tap a section to see it on the map.
Plus 3 shorter pieces under one kilometre, 0.3 km in total.
Driving on the A 42?
Drive mode tells you when an unrestricted section begins and when it ends.
Open the mapThe map shows Autobahn sections tagged maxspeed=none. The site fetches them via the Overpass API and keeps them in your browser for seven days.
Roadworks, temporary limits and the current state of variable signs are not in the data. Where nobody has mapped a speed limit yet, a section may be missing.
The map and alerts are an overview, not navigation. Road signs and German traffic law always apply. Don't use the app while driving.
For comparison: in 2015 the Federal Highway Research Institute (BASt) counted around 18,100 km of carriageway with no speed limit, just over 70 percent of the network. This figure is closest to the “both directions” value above. BASt survey 2015 (in German) ›