On Sun, 27 Sep 2015 17:11:58 +0100, Indy Jess John wrote:

On 27/09/2015 16:11, Tough Guy no. 1265 wrote:
On Sun, 27 Sep 2015 16:03:05 +0100, wrote:

Speed bumps? What a stupid name. They cause you to slow down.

Maybe they'e meant to bump you only if you're speeding. Which they don't, as the faster you go the less you get jolted. I have to laugh at people going over them at 5mph, and I can see the occupants of the car being shoved about. If you go about twice the sped limit, the suspension may get a jolt, but the occupants of the car do not.

The best speed varies from car to car, and it depends on the distance
between the front and back wheels and the design of the suspension.
Typically the best speed will be found (by trial and error) to be
between 37 and 47mph.

I've always found that it's a multiple or factor of the speed limit, with higher numbers getting smoother for the occupants. For example a 20mph bump should be taken at 5, 10, 20, or 40. 15 is worse than 20.

--
Although I can accept talking scarecrows, lions and great wizards of emerald cities, I find it hard to believe there is no paperwork involved when your house lands on a witch.
-- Dave James