Student driver or new driver stickers on cars. I swear 20% of the cars on the road in my area have them lately. That said, I do actually think in this case that there has been an increase in adoption of these stickers (possibly to try and hand waive bad behavior of the driver?) but when I first mentioned it to my husband, he blamed it on Baader-Meinhof.
The ones I’m talking about are just bumper stickers. What’s the difference between a learner and a new driver in your jurisdiction?