Originally Posted by
ian
unfortunately, it is much more than this.
In NSW at least, there is extensive research* backing the following:
1. Prior to graduated licencing, and a minimum number of hours of supervised experience, when a person obtained their licence, their main driving skill was an ability to pass the driving test. Nothing more. The typical student fronted for a driving test with less than 20 hours behind the wheel. That person then spent the next few years actually learning to drive, how to judge distances, how to control a vehicle outside the confines of a suburban street and 40 km/h. Not surprisingly, many drivers crashed whilst gaining this additional experience.
2. Graduated licencing is intended to minimise the risk, while young people gain the driving experience needed to survive on their own.
3. The minimum number of supervised hours is intended to try and give young people some experience under different driving conditions -- night, day, freeway, traffic, etc -- prior to them going full independent. Unfortunately, too many learners rack up their hours sitting in peak hour traffic blindly following the car in front, braking when it brakes, crawling forward when it moves, etc, or driving along the freeway on Sunday afternoon with the car on cruise control. Very few actually get to think about the need to reduce speed on the approach to a tight corner because it's all too hard to go looking for those types of road. And anecdotally, most learners with 120 hours in the log book, actually only have around 60% of those hours.
4. One side effect of the 120 supervised hours requirement is that some young people put off obtaining a licence. The jury is out on whether this is a good or bad thing. One impact might be that instead of a bunch of 17 and 18 year olds starting to drive independently after a nominal 120 hours of supervision, it will be a bunch of 23 year olds driving independently (while still learning to drive) after a much shorter period of supervision.
5. road safety experts see self-driving cars as the "next big thing" to reduce the road toll. Personally I have my doubts.