Interesting, but I wonder what their lifespan is? A UK company is using old car tyres (possibly some of those wrecked by asphalt speed humps) to make rubber speed humps. On 6 November I drove through Coulsdon near Croydon on the Futurecar Brighton to London run, and that had the best example of a traffic calmed high street I have ever seen in the UK, using narrow car lanes, parking, planted pinch points and short sections of cobbled surface, and having the psychological effect of making me drive down it at 20mph whatever the true speed limit actually was. Congratulations to the council concerned and its traffic planners.