Why wouldnt it make more sense for the sidewalk to be just one strip of concrete similar to how roads are made?
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This is also not universal. In the UK for example, it’s common to see sidewalks made of concrete tiles ( 20-45cm a side and usually rectangular – that’s 8-18” on a side for the Americans among us), but it’s also common to see them as poured and rolled tarmac like the surface of a road, with a heavy stone/concrete piece as the outer edge to keep it in.
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