I've always found
ring roads very interesting pieces of infrastructure, allowing long distance traffic bypass cities core. Of course they were taken to extremes in the US with the infamous tight loops cutting of downtowns to the rest of the city.
Anyway, as I'm putting together all kinds of census tracts and district groupings, I got curious to know on
how many people live inside ring roads all over the world. Time consuming, but fun. There might be tiny pieces of land/population that doesn't match perfectly due boundaries, parts inside, parts of, but it will be negligible.
Let's start with:
London - M25
Lenght: 188 km
--- 2021 ------- 2011 ------- 2001 --------- Growth ------------ Area -------- Density
9,775,759 --- 9,066,597 --- 7,996,351 --- +7.8% -- +13.4% --- 2,170 Km² --- 4,505 inh./Km²
It encircles the entire Greater London except for a small tip east of it plus several other jurisdictions comprising an extra 1 million people.
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