As a matter of friendly advice to younger people (most burners being younger than I am), I'll mention that I long since learned to accept the speed of the vehicle in front of me as "prevailing road conditions". Benefits include lower blood pressure, longer life expectancy etc.
Those super slow busses and truck and trailer's I passed on the 447 way back from BRC last year did indeed raise my blood pressure and lower my life expectancy. They were good clean passes. Generally I don't pass many vehicles but few go so slow out here in defaultia as some of the sketchy and overloaded vehicles that leave BRC.
The person attempting to turn around the rental truck with the pull behind generator in the middle of a corner was super scary. I was glad I had my brake controller set to initially brake hard on that one.
I'll never leave monday night again. I must have seen at least a half dozen spots where vehicles left the road and then there were the guys that ran in to the herd of cattle. Ouch! That left a mark!
It was a very dangerous drive that night.
For all of you who are new to the event. Do not overestimate your ability to drive safely as you exodus. A week of partying in the heat and routine sleep deprivation take it's tole. Driving is a complex task and you want all your faculties at 100% before you head out.
I would advise against traveling at night when leaving the event. Just get another nights sleep and leave when you wake up in the morning. I bring a tent just for that last night so that all I have to do in the morning is tear it down, have a quick breakfast, do a walk around of the vehicle and head out. This year I will use that tent. I really pressed my luck last year.