What I've seen in the trailers, loading/unloading of trailers is done by machines now.
Pull into the Warehouse, probley select a trailer going by what it is/where it goes/if there's any special things about it(Fragile/Overweight/Time Limit/etc...)/and the reward for delivering it.
Then a machine grabs a trailer and puts it perfectly on your truck for you to hook it up, and you're on your way.
It's pretty much like the 18 WoS Series except the trailer gets hooked for you. I like this.
