The server could protect areas to be used as roadways that connect towns. There could also be railroads in busier places.
It would take a lot of time and effort to protect all those roadways between towns, and railroads would also be a mess as minecarts are entities. The server offers transportation to towns by town portals and warps, both of which need to be bought by the town mayor. If the town mayor wants to have roads connecting his town to another he should be the one that watches and maintain the roads. While the idea of this is nice, there are way to many towns out there to really consider protected roads a viable option
The roadways would be bought by mayors for example they would buy 2x2 squares that they could connect there towns
There is something similar that the server does has that I forgot to mention and that is Town-Town Portals. They are a way for a President to put a portal in both of his town and provide travel that way. But from what I know of that you must be the original owner of both town for that app to be accepted. As I said before though, this does sound like a great idea but the implementation of it would be a lot of work for what it adds.
I think you should really re-work this suggesion to have it be that town-town portals can connect towns outside of a presidetns offical nation. That way to friends can connect there towns and such. Make a new suggestion saying that maxcarr and you have my support.
You see, we tried this, a veeeeeeeeeeery long time ago..... Back in the days when griefing in the wild was a banable offense, so it was far more possible of an endeavor than it would be today. I intended on connecting all cities on ECC With an above-ground rail Line, with my city being the hub, but we weren't able to raise enough funds, not enough materials, before we lost hope. I intend to have a rail-system throughout my 600x600 town, but naturally that is a much smaller level.