I usually think they are all about making useless rules to validate the jobs. OSHA needs to fix this with even portable mounted AC's in the trucks. Not for the drivers comfort, because if that guy passes out driving then anyone in the trucks path is dead or if he passes out and falls out of the moving truck since he was so out of it he forgot the seatbelt. This is a huge safety issue for the public. The real reason they don't have AC's is because of costing more gas, profit fucking margins so let the drivers die or kill someone unintentionally. If a driver passes out from heat the people that the truck kills, their families will be raking in a lot of cash from the lawsuit showing UPS's **CHEAPNESS** was the entire reason that the guy passed out driving, now that the man showed dangerous temps of 120F over 20 degrees higher than inside. These trucks are also iceboxes. Hell combines on farms are more userfriendly then these prison heat boxes they punish their workers with.