A frequent, local subway can be as fast as a "big" train plus a connection. From Copenhagen Airport to the centre, by ordinary metro, is 17 minutes. I'll take

A frequent, local subway can be as fast as a "big" train plus a connection. From Copenhagen Airport to the centre, by ordinary metro, is 17 minutes. I'll take a subway connection over a bus any day. Anyway, this comment suggests the reason it's a problem in the USA is regulation. (I can't speculate on why this happened, I don't see which political group is supposed to benefit.) https://news.ycombinator.com/item?id=27944624 https://news.ycombinator.com/item?id=27944624