I read the same article a while ago and added it to my (long) list of business proto-ideas. Here are the notes I scribbled a few years ago:

"Build a web app/site that allows people to practice smoothing out waves, speed up time to see effects easily, animate the process for visual understanding, etc., etc. Maybe even issue stickers so one can identify people who are smoothers rather than just people cutting in line."

Lately, a mobile app or an app built into the car's computer system could coordinate smoothing actions with other cars, and give some feedback on real time smoothing.