One year after my 2016 post Roundabouts in Europe, it’s time for a little follow-up. As stated in Répartition des ronds-points en France : édition 2017 (in French), I have updated my methodology in order to get a more accurate account of roundabouts, based on OpenStreetMap data.
The main methodological change is that I now take into account what OpenStreetMap calls « mini-roundabouts« , that are stored as points instead of ways (like standard roundabouts). Mini-roundabouts are « a special type of roundabout in which the middle can be traversed by vehicles » and represent a significant part of all roundabouts in some places.
I have studied the same 20 countries than last year’s post, plus Iceland. Here are the results:
France still holds the record of roundabouts density, by far. Our newcomer, Iceland, contrasts with Nordic countries since its roundabouts density is comparable to Portugal and Spain!
|Country||Roundabout number per 1,000 inhabitants (2016)*||Roundabout number per 1,000 inhabitants (2017)||Roundabout number (2017)|
(*) re-calculated with the new methodology
Regional divides are interesting to notice: East/West division in France and Switzerland, North/South in Italy and Belgium (it looks like Francophones really like their roundabouts). It is also remarkable that all capital regions seem to have a lower roundabouts density than their immediate neighbours (Paris, Madrid, London, Lisbon are particularly noticeable).
2016 – 2017 evolution
Finally, let’s compare the density of roundabouts country-wise. Only two countries are experiencing a decrease in roundabouts density – although their absolute number of roundabouts is still increasing: Ireland and Luxembourg.
There is no clear overall trend: some of the fastest roundabouts-building countries have relatively low roundabouts densities in the first place (Poland and Slovenia), whereas Portugal keeps running for the first place.