Whilst agreeing with all of the above, the barrier in the vid is not designed well.
It’s there to protect the roadside furniture, but at the same time, it should do it in a way that offers the least danger to a vagrant vehicle.
There should have been a flare on the taper to direct a vehicle back onto the carriage way, before rising to full height.
IIRC The UK’s transport and road research laboratory (TRRL) was set up in the mid 70s and had a history of research dating back to the 30s.
I think it was privatised in the 90s, but their labs did all the official crash tests trying out variants of safety barriers to come up with appropriate functional designs.
The favored outcome was tensioned guardrail with sacrificial intermediate “positioning” posts who’s only function was to maintain the alignment of the barrier prior to an impact.
There are other types but not so effective IMO, the US and the UK use a lot of tensioned wire rope mechanisms these days.
Roadside furniture protection should also safeguard the errant vehicle as much as possible.
I’m not very popular in my theory of the evolution of the motorcycle. In my day, small bikes were 150cc and would barely do 50 mph, bigger bikes went up to 650cc but still they were heavy, old tech and you would be lucky to push them up to the ton without tuning.
In those days helmets were optional but we used to use them, but clothing was basic, jeans and a tight fitting jacket, with no protection at all. We’d ride up to 90mph but all the time going through our minds was “what if I come off?”
If you’ve ever seen the aftermath of someone in shorts or jeans coming off at speed, the road will shave your flesh to the bones in a matter a few hundred yards.
Then came the more modern era of protection, leather, Kevlar, back braces and armor, hi-tech helmets full face, steel and Kevlar lined boots and so on.
I’m sure the added protection has changed the modern rider’s approach to speed to the extent that (young riders in particular) feel invincible.
You’ll see on Utoob guys arsing around at 150mph + coming off and walking away from very high speed solo slides on the asphalt.
I applaud the reduction in road deaths, but we’ve got to the state where we’ve interfered with Darwin’s principles, and many riders simply don’t have the sense or intellect to appreciate their vulnerability on today’s high speed machines.
The same goes for car safety features, self tensioning seatbelts, air bags front, side all over, collapsible components, impact absorbing dash boards the lot. Drivers have generally lost all sense of fragility in these vehicles, so the speed and lack of care increases.
It’s evolution I suppose, but IMO it’s good therapy to take yourself back in time occasionally, to consider what would happen if these high tech gadgets were not there.