I have also written to the council a couple of times in the last year or so. We have a baby and I find that traffic speeds up as we approach the zebra crossings rather than slowing down. It's quite dangerous stepping out onto the road.
I was told that the council cannot raise the speed bumps because the road is on an ambulance route, which is handy because there is likely to be an accident sooner or later. I was also told that cameras won't be put in until there has been an accident. So that's nice.
What really annoys me about it is that the people who speed are not local so they just don't care. They only use the road precisely because they can speed without getting caught. Whenever we walk around the side roads (where presumably people are more likely to be local) people are very kind and often stop to let us cross with the pushchair.
I have twice in the last year seen mothers shouted at by speeding drivers. The first time the driver came down the hill at speed and shouted out his window at a mother crossing with her pram. He then came into a Sainsbury's where she was shopping and shouted at her some more - I am the least likely person to join a fight but had to step in to defend her. The driver said he didn't think he should have to slow/down stop as people never say thanks! More recently another mother had abuse hurled at her by a speeding driver as he thought she'd stepped out too quickly.
We live at the top of the hill and the problem is equally bad there - blind bend, speeding up the hill, junction of three roads and a primary school. A recipe for disaster. I've seen there have been a couple of crashes there in the last year but nobody was hurt. So that's fine by the council.
I'm not sure what the answer is as the council really do not seem interested. Perhaps we ought to draw up a petition or something so the council realises how many local people are affected by this.