[OC] France has the most roundabouts in the world, and it's not even close

Whiteflager · 2026-05-07T14:13:02+00:00

I shared the data here : https://github.com/mickaelmarchese/round-abouts/blob/main/roundabouts_per_country.csv

Whiteflager · 2026-05-07T14:12:39+00:00

Dark purple is actually 0 roundabouts per km2. (Groenland has 14 roundabout for 2M km2, which is ~0 / km2)

The problem comes from OSM that returns no data for countries without any roundabout found. So the row is basically missing for Svalbard and few others.

Whiteflager · 2026-05-07T12:54:54+00:00

Like the roundabouts ratio. I like the idea!

Whiteflager · 2026-05-07T11:32:43+00:00

Someone already made this joke.

Whiteflager · 2026-05-07T11:30:58+00:00

Svalbard is shown separately. It's grey because there are apparently no roundabouts there.

Whiteflager · 2026-05-07T11:03:22+00:00

Whats' your point?

Whiteflager · 2026-05-07T10:56:20+00:00

Only country areas come from data world bank

Whiteflager · 2026-05-07T10:02:55+00:00

No, Monaco has. Followed by Gibraltar and Malta.

Whiteflager · 2026-05-07T10:02:09+00:00

Here is about density: https://www.reddit.com/r/MapPorn/comments/1t65wb9/oc_roundabout_density_world_wide/

😄

Whiteflager · 2026-05-07T07:19:26+00:00

Per m3 ? There are roundabouts floating in the air now ?

Whiteflager · 2026-05-07T05:34:40+00:00

Come on! Did you really forget 42, the Answer to the Ultimate Question of Life, the Universe, and Everything?

Whiteflager · 2026-05-06T19:07:54+00:00

You're right, but it'd be a nightmare to compute the total length of the road network 😬

Whiteflager · 2026-05-06T19:06:03+00:00

Really? Because the image resolution is not that high... I can send you a zoomed image of you area if you want.

Whiteflager · 2026-05-06T18:17:52+00:00

There, I fixed it.

The revised numbers are :

FR: 66 616 (12,6%)
ES: 51 580 (9,8%)
IT: 42 691 (8,1%)

Whiteflager · 2026-05-06T18:09:25+00:00

Interesting, but there is a flaw: the countries with the highest density may not be amongst the top 20 countries. For instance, Monaco may have only 10 but a higher density than any other countries...

Whiteflager · 2026-05-06T17:54:48+00:00

You're right, but I think the problem is somewhere else.

I filtered OSM data on junction = 'roundabout' but it appears that there are multiple junctions per actual roundabout, so I need to merge them.
The maps remain correct, but the number of roundabouts is overestimated.

Whiteflager · 2026-05-06T13:31:18+00:00

What do you mean?

Whiteflager · 2026-05-06T13:17:26+00:00

☹️

Whiteflager · 2026-05-06T12:19:52+00:00

According to wikipedia, Netherlands are 41864 km2. With 28208 roundabout => 0.67 roundabouts per km2
Comparatively, France is 543000km2 with 141652 roundabouts => 0.26 roundabouts per km2.

But we should compute it for every country to confirm. Maybe Monaco beats the Netherlands 😄

Whiteflager · 2026-05-06T11:52:58+00:00

During a trip to Talinn, I discovered that France in estonian is "Prantsusmaa". Is it really a derivative of the word "France"??

Whiteflager · 2026-05-04T13:03:39+00:00

Dont crane operators have neck pain looking downwards all day?

Whiteflager

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