Idiots that can't drive properly maybe drive until their wheels touch the kerb? I very rarely see this in the UK, that's madness.
Fun fact, when I visited the USA I was very confused by these weird concrete slabs they had in their car parks along each parking space.
Turns out, enough of their drivers are incompetent enough at driving that they're put there for them to bump up against as they're parking, because they aren't able to figure out how to park properly by themselves xD amazing.
The US doesn't have compulsory drivers education to obtain a drivers license, so most people have a broad set of bad practices while driving. No one teaches people in the US how to drive safely and with etiquette.