I posted that link because someone stated that any driver who did not know the speed limit for a given section of road was undeserving of his licence. It is a stupid position to take.
Drivers should first and foremost rely on their skills of observation to judge what is a safe speed. They should not refer to the number on a stick and set their speed according to that. How many people do you know who see a NSL sign and immediately speed up? That's the dangerous behaviour here.
People seem to be assuming that I drive at warp speed everywhere I go. It's the same flawed line of thinking that some motorists take when presuming that "all cyclists ignore red lights and don't pay road tax".
Dig just a bit beneath the surface and one finds the same silly stereotypes and prejudices, no matter where one goes.
People here are taking you at your word that you daily exceed the speed limit: This is nothing to do with assuming you "drive at warp speed everywhere". You admitted an illegal activity which is correlated strongly with increased risk to others. You branded yourself.
Nice strawman. No-one has said that drivers should always drive at the speed limit, but they should always drive below it.
The speed limit is the maximum safe speed. The actual safe speed is very often lower.
I will grant that, in some limited situations, someone can exceed the speed limit without much additional risk (note any increase in speed is by definition more dangerous) but for some odd reason we have decided that we can't rely on people's judgement for that. I wonder why?
"The speed limit is the
maximum safe speed" - well, it is the maximum legal speed, below which you should be safely driving might be a better way of phrasing it, but I think I'm agreeing with the sense of your post
. As indicated in my reply to PoD, in the link he posted, even on a dry day the incorrectly-signed 30mph limit is not one I'd aim to be driving at! Not sure what his point actually was in posting that, because it certainly did not justify exceeding the speed limit (unless he happens to know of a 5mph limit on that stretch of road, which isn't indicated).
Now I could have posted a picture of a N.London major highway, currently undergoing repair, where there is a 40mph limit which changes to a 50mph limit, but has a single 30mph sign displayed, rather confusingly, to the left (I suspect where a slip has been removed). It's
possible that the limit on the nearside lane there is actually still 30, according to the paperwork ....
Back to the difficulties of 20mph limits perhaps? Is the 20 limit on Tower Bridge still in place? That seemed to be generally observed last time I crossed.