dombooth wrote:I mean that by them slowing down it would in turn mean that they would have more time to think about the road, plan things and not be going flat out round corners they can't see round.
What you describe sounds to me like careless or dangerous driving, not speeding.
If a driver does not have time to observe everything that's going on and plan accordingly, or if they can't stop in the distance they can see is clear (etc.) then of course they need to slow down. The speed they need to slow down to is determined by how far they can see to be clear, and how much time they need to observe and plan. The speed they need to slow down to for those purposes has absolutely nothing to do with the speed limit. It might, by chance, coincide with the speed limit. It might be faster than the speed limit. It might be slower than the speed limit. If the driver encounters identical conditions at the same place tomorrow, the speed they will need to slow down to tomorrow will be the same as the speed they need to slow down to today, even if overnight somebody posts a different speed limit, or (hypothetically) takes the speed limit away completely.
If the driver slows down such that they can now stop in the distance they can see is clear (etc.) and they have time to observe and plan, but their speed is above the limit, then they have achieved all they need to make their driving safe. They will need to slow further, however, if they also want their driving to be legal.