M1 between Brisbane and Gold Coast at 4am on the way to work 120-130 , on the way home whatever the traffic dictates , as bad as 40 and sometimes small jumps around 120 between pockets of slow moving asshowles
Whatever speed I feel comfortable at some roads I wouldn't go over 120kmh other I wouldn't go under 120kmh but Where I can get away with it I like 140kmh of course it all depends on weather, visibility etc
I like 130kmh to140imp with a wind shield and 100kmp without . I have travelled a lot faster going up north Queensland last year .travelling at those high speeds i was topping fuel tank up every hour or so