. It's not that difficult, it does however require one to actually pay attention to their surroundings. Just keep the engine spinning at a reasonable speed not down at silly low rpm then just listen & feel for the engine revving on. Also visual clues like how fast stationary objects are passing give you very good indications of speed changes in either direction.
So if you see a scamera sign or roadside yellow box, you are so confident in your ability that you won't check your speedo?
Regardless, upto to that point I agree, however, searching the roadside trying to spot camouflaged scameras (which was what one poster was advocating and the point I was answering in an earlier post) would imo take more of the average drivers attention than was safe or they would be too busy staring at the speedo, especially if they are close to the totting up.
I would imagine anyone who needs a car and is on 9 points would be a nervous wreck and an absolute liability.
NOW no doubt someone will pop along and say if you have been caught out to have 9 points then you deserve all you get, and in the past with a good old traffic officer on the beat I would agree, HOWEVER scameras like buses always come in 3's or 4's, SO quite easily you could drive down a 1 mile stretch of road in the belief it was a 40 limit (that it may have been months ago) and end up getting caught by 3 cameras in a row, 9 points but only 1 offence.
Bloody hell burglars can ask for xyz other robberies to be taken into account and still only get 1 sentence or sentences that run concurrent, yet a motorist commits one 'crime' and gets 3 sentences!!!!!!
If it was the good old traffic officer, the odds are if you where driving sensibly you would get a slap on the wrist and warned the limit had changed, at the very worst you would get 3 points, but you sure as hell wouldn't continue on your merry way speeding for the next mile to get caught twice more!!