I have one of these. Hyundai.
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Definitely a small car, but I can get 5 people in.
Sometimes when I am driving and see some of these drivers in these big cars, it's almost as if they are at the top of the stairs and I am at the bottom and I do find that many feel they are superior as a result of being 'bigger' and will refuse to give way and almost bully you into YOU doing so, because you have no other alternative other than to give way to them.
Pollution is still a big issue. Space is still a big issue.
Encourage smaller cars. Very simple really.
I park at the Belgrade Plaza car park and often the cars are so big they stick out into the pedestrian walkway and you actually have to walk into the path of cars to get round them.
Can't see building bigger spaces will work because of the aforementioned lack of space issue.