This is the size of Larna:

Lately I have been working in transportation in my cities, You shold know that by now Larna has gone up to 23 million, yet it is very orthogonal, no diagonal streets. Any way, I have found that the most modest way of transportation in the simcity menu, the Train, has become the best way for transportation inside my cities, I have found it interestiong that I can use a semy-subway train by digging a web of rails.