As far as speed goes - I think you will find some roads like that in any area - just around here, without thinking hard at all - there are 4 where the speed limit is 25, but do less than 40 on them, and you WILL get hit in the ***** - even police in marked cars are doing about 40 without audible siren or emergency lights flashing.
And some of the highways - well, stay in the right lane and your fine, go left, forget 65, it's more like 75-80 or more. (once kept a fairly steady 90 and still had people, including one cop, pass me).
But the more you do it, the less of a problem it is - but no do not try to keep up with that if you are just learning essentially! - Those people have been driving for years, and are unaware you have not.