While there are a few cowboys out there, I have to take my hat off the the humble big rig driver.
The reason? I just drove a (not so big) truck 900km from Sydney to Wagga and back...and was amazed how dopey some car drivers were.
1) if you are not in a truck's mirrors, he/she can't see you.
2) if a truck indicates, it is probably going to change lanes in the direction of the indicators.
3) it is not a good time to overtake/undertake a truck when it does indicate
4) pulling infront of a truck at the last second before a red light is a little suicidal.
5) don't go the wrong way down a one way service lane and expect a truck to back up for you.
BTW went through several speed traps along the Hume. Thankfully my rig was flat out doing 100km/hr