Current Licencing ought to be similar as in Aviation....like presently between motorcycles, cars, buses & trucks (heavy vehicles).
A driver completes the L Plate & P Plate courses....allowing them to operate a standard Sedan; plus Advanced Driving courses need to be mandatory....how to manage a skid, driving to conditions, basic maintenance - check water, oil, tyre pressure & condition, etc
To operate other types of vehicles the driver needs to have an endorsement for that type of vehicle BEFORE they can own and/or drive another type of vehicle....such as a 4-wheel drive/off-road - Landcruiser/Navara/Pajero/Discovery etc.
Drivers then would be MORE familiar of the characteristics of the type of vehicle they are driving - Sedan/Coupe; Sports Vehicles - Holden SV, Ford FPV, Pasta Rockets, etc; SUV; 4-wheel drive - Landcruiser/Navara/Pajero/Discovery etc; Utes - Hilux, Maloo, Tridon, etc.
Similarly for hauling trailers.....the driver needs to have a Trailer operating endorsement BEFORE they can own and/or rent such a trailer whether it be small single axle or a 2 axle Tandem trailer.
Also Medical & Retest Rules & Driving test for Drivers every 5/10 years. Presently in Aviation, a Bi-annual Flight Review is mandatory if you want to retain your endorsements.
Cynics would say this gives the RTA the licence to print money; but, it would compel licenced drivers to be better educated and perhaps change the present driving culture of Give me my Right of Way...!.