Time for new road signage?

[KB_S1]

Whilst driving home yesterday in shocking weather - 80mph gusts and rain- I noticed how inadaquete the road signs were.
For example, SLOW on the road surface warning of a corner. Most of the corners I came across with this warning can easily be negotiated at NSL + in a modern car, even in the poor weather.
Speed camera warnings - there is none, but it does let you know a reasonable O/taking zone is coming up, they are however distracting.
One thing missing that i would have appreciated was a warning about the poor surface approaching.
Several times as i was starting to turn in my car was upset by very short sharp bumps in the road that were near impossible to spot.
these bumps are a much bigger problem for modern cars with lower profile tyres and firm damping and were far more likely to cause me grief than any bend, which i can see.

Slight o/t, this new stuff they are using to patch up roads is rubbish, in the wet you can feel the difference as you move from tarmac to crap mac.

[Pigeon]

KB_S1 said:

For example, SLOW on the road surface warning of a corner. Most of the corners I came across with this warning can easily be negotiated at NSL + in a modern car, even in the poor weather.

SLOW on the road surface is often quite useful I find, perhaps because it is old enough to date from more sensible times. While many of them are redundant, a not insignificant number indicate the presence of some additional hazard, such as an unsighted junction just round the bend, or a bend that tightens as you go round.

What does me off is the more modern technique of deciding that since a particular bend can be negotiated with a crap car with bald tyres at a maximum speed of something over 40mph in the wet, and then applying a 40mph limit for a mile either side of it...