ed_m wrote:
no no by all means carry on... if you'd prefer to continue arguing the toss with weepej rather than addressing my more reasoned viewpoint

Yes, your argument is [
more] reasoned

Unfortunately, weepej was first off the starting block (starting the topic drift) and I had already started crossing swords when you first responded - that can't be helped. If anything, I would prefer non-reasoned arguments to not be presented at all.
Anyway, to address your point:
ed_m wrote:
I have a pretty good idea of my speed based on engine noise and gear, road/wind noise
Not everyone can judge the speed of a car by the engine note, indeed some can’t be heard even when gently accelerating.
I drive a variety of cars, with different gear ratios and engine configurations.
Wind noise can be highly misleading, you could be fooled into thinking you’re doing 25 when your actually at 35 if there is a 10mph tailwind.
Road noise varies with the type of surface.
ed_m wrote:
… and of course occasional speedo checks, I also have eyes enough in my head to see a change in speed limit (two big lolipops on either side of the road what more do you want? flashing ones??.. oh i see

) and enough driving experience to know when to anticipate a change in speed limit or the need to check for street lighting and/or speed limit repeaters.
One issue surrounding this is the needlessly low setting of speed limits. You have to realise that people don’t set out to exceed limits, the great majority actually want to remain within them, but are caught out with the occasional creep back up to reasonable travelling speeds. For these people (perhaps not yourself), VAS is greatly preferable as only a reminder is needed to remain compliant and speedo gazing isn’t required; this is the group that would instead gaze at the speedo near speed cameras. Sure, others make the conscious decision to exceed them, but do so reasonably; yes some are unreasonable about it, but that is what police is for.
ed_m wrote:
And yes, they cost money and are often broken and/or inaccurate.
They cost a damned site less than enforcement, yet have about the same level of ‘success’ (and is that comparison including RTTM and ‘bias on selection’?).
ed_m wrote:
If people's driving skills are poor enough to need a flashing sign how did they managed to pass a test (unless there were convenient flashing signs at every limit change along the test route)!
People have done just that - as indicated by the speedo (by a small amount of course). Don’t forget, speedos usually overread and can do so by a lot…..