There's another free OSM based app that does have some traffic data, it's called Magic Earth. Not open source though, as their business model is to sell adapted versions.

What does the size of the country have to do with it? Which good big and bad small countries are you talking about?

I think EveryDoor requires some relatively deep understanding of OSM before actually being a useful tool. So edits like this should be rare with that tool. Many of the edits like this are from when MapsMe was very popular and suddenly introduced editing, without enough nuance in the process. Bad edits do happen everywhere, you need a good balance between people who data curation and newbies making beginner mistakes. In some places, there's a lack of experienced people maintaining the data.

Isn't it as much about showing up to vote than about changing minds who to vote for?

Women are not even more dangerous than that they have to be

Eh sure, though only number 20 in the world when it comes to national legislation. But when it comes to quality of life or even life expectancy, the US could do so much better given its wealth. Mostly I'm just trying to point out the automatic patriotism you see so often in Americans, even the progressive ones.

More women as state leaders you say? So we might finally see female leaders in countries like India, Argentina, the UK, Pakistan, France, Turkey, Bangladesh, Ukraine or Germany if only the US would be the shining example to the world?! I'm sorry, but when it comes to social progress, the best the US can hope for is finally catching up. Any option to be exemplary was definitely gone by maybe the 1970s

In some places there are government basemaps available as well. These can be extremely accurate, up to centimeter precision. Of course they can be outdated or have mistakes too, and not all are as precise. So it's hard to answer the question without knowing the location. Always vest to consult with local mappers about things like this.

I don't see them...

Basically all countries that started having some economic growth since 1950 will have this spike effect. The countries that were already rich had a slow population transition, the other ones a fast one. The short version of that story is that in the latter child mortality went down slowly, and in the the former it was a quick proces. People take some time to adapt to this new reality, which means that for a shirt period of time 10 of 10 children will grow up to have kids of their own. After a while, the amount of children goes down to 2 or less, and growth stops. In Europe, this lade population multiply by two or three, in North Africa for example it can be up to times five or more. And in modern societies, this kind of growth tends to concentrate in cities.