[ska]

Isn't that why lots of of jurisdictions have constraints on the learning driver (e.g. graduated licensing of some sort) and/or visibility requirements (e.g. car has to have a "learner" sticker of some sort) so that other drivers know?

[maximus-decimus]

I literally never heard of such stickers.

[paulryanrogers]

We had them in the Midwest US. And the learner vehicles have an extra break pedal for the instructor.

Which is good because a student in my group nearly killed us trying to merge into a semi.