The proposal to require drivers on restricted licences to display an R-plate doesn't bother me much. In essence, it is an extension of the learner L-plate requirement.
It has occurred to me to ask, without knowing the answer, if the solution we have is not backwards, and the opposite would work much better. Rather than requiring learner and restricted drivers to display information on their licence status for all to see, the privilege of having a full licence could be displayed would transfer scrutiny on to cars without plates. I'm thinking something electronic might be required to prevent plates being borrowed. Just a thought.
David Kilgour - Here Come The Cars, 1991