personally I would think that riding on a shared cycleway at 40 at any time is idiotic and irresponsible and part of the reason why the general public seem to be against cyclists in general - if we as a whole want to be accepted on roads , cycle paths etc then we should show a modicum of common sense , if you want to travel at high speed then use a road !just my opinion
To be clear, it's almost always going to be a daft thing to do, but just rarely, it wouldn't be that irresponsible. The point was, it's not being shared use that makes it idiotic. It's how busy a route is and the sightlines and things like that which determines what speeds are safe, not the legal status. In theory, motor speed limits are set based on such considerations (see your county council's speed management policy), but I'm sure we all know examples in practice where the limits are out of date or just bizarre (40mph through my village with a crash-prone staggered crossroads, blind bends and narrow river bridge, for example, or a road two villages over where the limit lifts from 30 to 60 as the tarmac ends and gravel starts).
As for "if you want to travel at high speed then use a road", that seems a bad generalisation because the two example sections of cycleway are far better suited for high speeds (better surface, better visibility, fewer junctions, few permitted motor vehicles) than most nearby roads.
I have just come back from majorca and the arrogance shown by some cyclists was unbelievable , one shouting and moaning at others coming up the mountain because he was coming down and wanted to use the wrong side of the road to corner rather than slow down , regardless of other road users . I can only put it down to Audi and bmw drivers have now taken to the roads on bikes
and that wasn't a pop at majorca as I think its the best place ive ever been for cycling and the car/coach drivers must have the patience of saints
Totally out of order, shouting at people riding uphill as you descend. It always used to be that downhill gave way to uphill because those climbing might not be able to restart if they stop (whether cyclist or motorist). I'm not sure if that was written anywhere, or just a widespread rule of thumb like "power gives way to sail",
It's not new, daffodils taking to the roads on bikes. There are daffodil drivers, daffodil riders, daffodil runners, daffodil dog walkers and more. They don't stop being daffodils just because they change mode of travel. They're probably daffodils while on a bus or train, too, but they've not got controls then (we hope, if driver training is working!). However, one daffodil activity kills many more than the others and that's not the one getting the attention just now. I wonder why?