Newer charter buses have rear proximity sensors to deter drafters??

[theycallmeebryan]

Whenever I am on the highway, I always seek out an opportunity to draft behind a large boxy vehicle. There is no arguing the FE gain potentials you can see from drafting.

Lately I have been noticing that newer charter buses seem to have a proximity sensor that detects when cars are close behind them. These buses have multiple sets of LED tail lights and they seem to flicker in different patterns depending on how close you are to the bus and how long you've been there (it seems to get more drastic if you try to ignore them). I thought at first it was the drivers of the buses doing it, but this has happened to me on multiple occasions and the brake light patterns seem similar between newer buses.

Has anyone else noticed this?

[FXSTi]

I have not noticed, probably because I don't tailgate. I think they need them to warn the tour bus driver when they are tailgating. I road on a tour bus a couple weeks ago and the driver was tail gating ridiculously until I wondered aloud (very loud) "If the truck in front of us stopped could we?" Suddenly he was on his best behavior for the rest of the trip.