I'm sure driving with the doors open in many delivery trucks helps as well, but I'm just as sure there are vehicle configurations where air is circulated betwee

I'm sure driving with the doors open in many delivery trucks helps as well, but I'm just as sure there are vehicle configurations where air is circulated between both areas and/or share an enclosed space. Keep in mind, this is also an aviation concern as well as loading/unloading. Resting in the backs of trucks on break, etc.