Yeh exactly, you end up having to move over half way into the other lane (bearing in mind these are narrow residential streets), such that the car actually rises up and doesnt smash the exhaust, but that could hardly be viewed as "safe" and doesnt work when theres oncoming traffic or parked cars! And ofcourse they're sized such that white van man, buses and trucks can still blast down the road at full speed without a care in the world due to their wider axles.
Seems the difference is between a 20mph speed limit and a 20mph "zone". A speed limit needs no traffic calming, but does need repeater signs at regular intervals. A "zone" needs no repeaters but must be self-regulating by use of traffic calming ****e. The regulations seem to stipulate where you should use a limit and where you should use a zone too.
The local dump and a few local macdonalds have fitted plastic "Sleeping policemen" type bumps which are so tall with such an aggressive ramp angle that i have to crawl over them and inch off doing literally 1mph because otherwise i smash the floor of the car off them.
I stopped and got out one day to have a look, and with the car simply parked over the bump, there was approx 5mm between the front subframe and the top of the bump. I could understand if i were driving some "slammed" chav-mobile, rather than a standard saloon car (albeit one equipped with factory sport suspension). I should really enquire as to wether they're actually legal, instead i just avoid mcdonalds and visit the dump as infrequently as possible.
