I am living on a very long road which is used a lot for people getting to and from school etc. There are big fat speed bumps in the road to keep motoriists under control. They don't appear to be working! A cab driver I hired earlier managed to drive over them quite slowly but described them as dangerous!
I bet it cost a fortune to put them in but to no avail. It does make me worry about school kids walking about. I will certainly be making good use of the zebra crossing's!