Answer: Doobie
As they are riding in Doobie's Taxiola to the Braidwood Inn, Doobie turns around and winks at Neal. Neal makes a disgusted face and then asks where the motel is. Del asks, "Doobie, is it much farther?" Doobie says, "Not much." "Why didn't you take the interstate?", Del asks. Doobie replies, "You said your friend has never been around here, so I figured he'd like to look around. You don't see nothin' on the interstate."