Roads and high density buildings different from sim city ?

[glowpiPe]

In simcity you had to make roads more or less perfect to get buildings to turn into high density buildings and not waste space. Also to get them to evolve into bigger buildings

In Cities: skyline. Is it enough to use a road guides and then just use high density zone ?
Just don't let zones overlap and its ok ?

Because i kinda always skrewed up in simcity with the road guides. Followed the guides on the different roads and then in the end. I had no room for high density buildings and basicly had to start over.

Also. The only effect of the roads is the traffic ? Doesnt make any difference on the buildings next to them ? Like if you use low density roads you only get shacks and if you use high density roads you get skyscrapers. Doesn't work like that right ?