The Rome metro is a great underground railway system. It's cheap, simple, fast, and frequent. Only problem: there are a mere two lines in the whole city — so there are very few places to which the metro actually goes. So the metro is really handy, but only on the rare occasion that it can actually get you where you want to go. This — combined with the city's haphazard and hard-to-decipher bus system — inevitably means that for the tourist, Rome is inevitably a city where you do a lot of walking. And for the locals, a city where you do a lot of driving. Public transport in Rome could use some expansion.