need a bit help...

[Imp]

Not really a roads a road, some people run 2 beside each other certainly if they split from running beside eac other its justified & if you assume road runs down the middle of the hex thats about a 60-70m wide highway so 3 lanes shoulder & a gap.
When you do buildings you will find you have to approximate to get the feel due to scale, urban always takes a bit of thought at least for me.