Diesel therapy is slang for prison transportation in the United States in which prisoners are shackled and then transported for days or weeks; the term refers to the diesel fuel used in prisoner transport vehicles.[1]
It has been alleged that some inmates are deliberately sent to incorrect destinations as an exercise of diesel therapy.[2]Voluntary surrender at the prison where the inmate will serve his time is recommended as a way of avoiding diesel therapy.[3]
Diesel therapy is sometimes used on disruptive inmates, including gang members.[4]
Oh no, that depends on the bus. Long trips, the guards want comfort. Those buses usually have AC, maybe not pointed at the prisoners but at least the bus is cool in general. Short trips though, where the guards are up front and prisoners in the back and separate? Total crap shoot. I know this from some personal experience in the NYS system.