Part-Time Casual Tractor Trailer Driver Who exactly are UPS Casual Tractor Trailer Drivers? First and foremost, they're part of one strong, national team and are a key part of our operations. We refer to them as feeder drivers. They drive a tractor trailer from one UPS location to another-or to a customer on an established route-before returning to their original location. So, after driving our well-maintained trucks, casual tractor trailer drivers are back home at the end of their day. What do…