Tell-ya-commuter

Different then a work from home telecommuter, a tell-ya-commuter spends every moment of their work commute talking on their cell phone with a relative, friend, or neighbor about whatever random mundane subject pops into their mind.

Although they had no reason to talk, Jim could expect a call from Dave every day at 8:07AM as Dave became a tell-ya-commuter on his way to the office.