Wow, this looks amazing!!!
The roads are much more variable in design (and hopefully texture) and appart from the obvious Alpha bugs only a few things stick out. The lack of way points and it seems to be that each vehicle has to return to the depot before being used again, which I really hope isn't the case especially for trains (could be interesting to see a fuel-distance for buses thing). Two things that weren't shown that I'm really hoping is that the rails for trains have the same complexity as the road system (single, double, quadruple and maybe electrified...) and at the end you can see the train has to make a loop, now that won't stay obviously but please, please make trams reversible like they do in real life.
For an alpha however this is awesome, and I can't wait to see the other new features to be implemented.