OpenStreetMap

I have just returned from a no-toll way trip through France. What struck me was the widespread errors in speed limit tags, or the complete absence thereof, especially on a 90 kph or 80 kph stretch. Is somebody actually taking care of this in the France OSM editor group?

Location: La Bouteille, Le Brethon, Montluçon, Allier, Auvergne-Rhône-Alpes, Metropolitan France, 03350, France

Comment from cquest on 3 August 2022 at 15:08

Speed limit is now a mess in France, as the government choose to switch from 90 to 80 km/h a couple of years ago, then local authority slowly switched back to 90 on some roads.

90 used to be the default in rural areas and we did not add the maxspeed=* at that time. Now that there is no clear default, we add them… slowly.

We’re also supposed to have all this as opendata since 2016, but still waiting for this to happen. Last announced deadline was Q2 2022…

Comment from SK53 on 3 August 2022 at 15:40

I had a quick look at an area I drove through a few years ago, and got the impression that speed limits are implicit from much of the tagging. Urban limits are often mapped and within those the speed limit is 50 kph. For single carriageway roads outside of towns most roads will be 80 kph (according to wikipedia only 1 department has 90 kph limits).

Clearly such information is hard to consume as pure speed limits; but urban area signs can be something used as a warning. The existence of implicit limits in the UK (aka national speed limits) is why the maxspeed:type tag came to be used, allowing maxspeed to be a numerical value.


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