Speed limits on highway=primary

Posted by SK53 on 13 April 2023 in English.

For a number of years I have sporadically looked to resolve missing speed limits on major highways (highway=trunk and highway=primary) in the UK. I use a simple Overpass query to find these in a manageable area (usually former regions of England + Wales, Scotland and Northern Ireland.

The other day a discussion arose on IRC about some distinctly English placenames in North Wales. Looking at the area I realised that the A493 had no speed limits added. As both Mapillary and now Bing Streetside imagery are now available in the iD editor, I was able to add limits from Aberdyfi to Tywyn. In the past this nearly always required a survey.

I was going to write about looking at limits elsewhere, but found it easier to add various pictures in a short Mastodon thread.

tl;dr: There’s lots of work everywhere to improve the mapping of maxspeed on highway=primary.

Location: Aberdovey, Gwynedd, Wales, United Kingdom


Comment from 4004 on 23 April 2023 at 21:00

I was unpleasantly surprised at how undermapped a lot of the UK is. Given the data available, and OSM starting in the UK, it’s quite sad

Comment from amapanda ᚛ᚐᚋᚐᚅᚇᚐ᚜ 🏳️‍🌈 on 26 April 2023 at 05:48

I calculated where the longest stretches of missing maxspeed tags are, for those interested in exploring more.

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