[jediali]

This is symptomonious of britains percieved attitude to the envirenment/resource consumption. What i mean is that the envirenment matters if it can give people (the public mostly) guilt trips, boost a politicians publicity or make someone feel better than other people because they drive a prius.

If politicians/counsellers where serious then issues like the above would be addressed. You could also say that these speed bumps etc are sponsored by consumable parts suppliers/makers but that would be silly. Also traffic layout in general, so traffic lights, lane, junction and roundabouts are designed to make smoother driving a possibility.