Hail a taxi in most American cities, and what are you likely to ride in? A Ford Crown Vic, maybe a minivan or an Escape Hybrid. But a few lucky residents of Rome had something decidedly more exotic recently when stoic carrozzeria Italdesign-Giugiaro outfitted its Quaranta concept with a meter, dome light and white paintjob to pull taxi duty around the Italian capital. Brave of them – have you ever tried navigating the overcrowded streets of Rome on anything larger than a Vespa? Good luck.