The foliage system was upgraded in the last year or so in UDK, but road support seems to be some sort of sore spot, with threads being locked on the UDK forums for people asking about it due to discussion of anything relating to other engines being banned.
As far as I know your best option is to create roads in specialized modeling tools and just import them as giant meshes. Or something like that.
I'm sad to hear about the dynamic light thing, if that means that CryEngine3 will support a ton of dynamic lights and UE4 will not. I just want good, efficient dynamic lighting and shadows, for free, working on old hardware. Oh, and a pony would be nice too.