Belgium and The Netherlands are little more than a load of sand that came down the Rhine - there's little in the way of topsoil. They have these roads which are just made of bricks in a herringbone pattern. Driving along these is like having square wheels. When the sand shifts underneath, you end up with undulations, humps and pits all over the place.
en.wiktionary.org/wiki/pav%C3%A9
(, Sun 4 Jul 2021, 15:15, Reply)