In the UK people consider "speeding" to be going 10mph or more over the limit. So 20/30mph really means 30/40mph, and in addition there are still many places with 40mph (50mph) roads going through.
Speed limit signs don't work. People will drive at whatever speed feels right and this is usually way above 20mph. What works is narrowing the roads. When the carriage way is barely wider than your vehicle it magically makes 20mph feel appropriate and 30mph seem fast (which it is). This has the bonus effect that larger vehicles feel it more, which is perfect considering they are the most dangerous and should be driven by trained professionals who are used to such tight spaces.
It essentially makes driving much more stressful, which is exactly what it should be. The problem at the moment is drivers get everything: big, wide, smooth roads, with the best drainage and grading; the easiest and most convenient mode of transport; but none of the responsibility. We need to shift the balance back. You can drive, but it's a big responsibility and if you fuck up the consequences are serious.
Speed limit signs don't work. People will drive at whatever speed feels right and this is usually way above 20mph. What works is narrowing the roads. When the carriage way is barely wider than your vehicle it magically makes 20mph feel appropriate and 30mph seem fast (which it is). This has the bonus effect that larger vehicles feel it more, which is perfect considering they are the most dangerous and should be driven by trained professionals who are used to such tight spaces.
It essentially makes driving much more stressful, which is exactly what it should be. The problem at the moment is drivers get everything: big, wide, smooth roads, with the best drainage and grading; the easiest and most convenient mode of transport; but none of the responsibility. We need to shift the balance back. You can drive, but it's a big responsibility and if you fuck up the consequences are serious.