Yep. In practice, you've probably got a group of over 70s who are much safer drivers than the average 17-24 year old and some with declining eyesight who are worse. The test proposes to distinguish between the two
The issue is that the "over 70s" group, while on the whole averages out to moderate safety, includes a number of individuals that are very dangerous drivers (to themselves, and to others). If one looks at the overall statistics, the group as a whole looks ok, but those dangerous outliers are the ones that get the "press coverage" on the nightly news when they do cause an incident, skewing peoples view of "over 70s drivers".
I am not objecting to the test. I am disagreeing with the sweeping statement.
I think testing eyesight is important. In fact you need to make a declaration about your eyesight when you first get a license and when you renew after 70. There is no real enforcement of the former either (they just ask you to read a number plate at a distance IIRC).
I imagine there’s something of a bathtub curve where young (under 25) drivers have higher accident rates due to some combination of inexperience and immaturity, while older drivers (over 70) have higher accident rates due to disability creeping up on them without them noticing.
After think about this a little: since these charts are per-driver, rather than per-mile, they're probably not as favorable as they seem. I would guess that retirees drive much less on average than working individuals.
Agreed over 70s are safer than younger drivers, but consider young drivers in most jurisdictions face restrictions while elderly drivers do not.
Further I’d say anecdotally that past a certain point, certainly by 80s, elderly drivers are not accident free. It’s that they have an increasing number of small accidents until someone takes away the keys. If they do not have someone in their life to do that it’s probably reasonable that the government make that determination.
At some point the reduced vision and reflex speed makes them too hazardous on the road to others, even if they are driving slowly and carefully. Parking lot accidents, hitting kids, slamming the gas instead of the brakes, etc.
Teenagers have obligations. Retirees don't or if they do they're far more flexible. Grandma can just not drive at night or in bad weather. Somme teenager typically can't.
So the inherent risk of the situations in which they drive does tend to favor seniors generally
Both groups are way more likely to have early/late/all weather obligations than seniors. I suspect likelihood of having an early/late obligation peaks in one's 20s.
Evidence? I thought over-70s were on average safer than young drivers