I think it's also important to note that the learner and provisional drivers need to have a sign clearly on their vehicle to indicate their level: a yellow L, red P or green P.

This helps you show some patience to L platers and also give red P plater dickheads in tradie utes who love tailgating a wide berth.

They also have different speed limits. L isn't allowed to exceed 80km/h, red P 90km/h and green P 100km/h.

Most national motorways have 110km/h limits so you end up having to dodge L plate drivers with a 30km/h speed differential to you. I think while well intentioned the speed limit rules are more dangerous than they help.