Years ago, before I decided to only use the right two lanes, I'd been stuck behind a car in the left lane for a few miles in my '76 GMC Crew Cab.
Sure enough, a cop came in behind me - from an on ramp, no, doubt, and I had really been concentrating on the car in front of me.
Anyway, he said "Normally I'd call that tailgating, but that was pushing".