I have just finished reading the article "Green Mean & Clean" by Judith Woods and it occurred to me that the Millbrook Proving Ground could be used to demonstrate the effect that the ubiquitous speed bumps have on emissions and mpg. Judith says that Millbrook features driving conditions typical of Britain's roads, including potholes, but no mention of speed bumps, so perhaps a campaign to organise this sort of testing would get the attention of the blinkered Local Authorities who continue to force these monstrosities on us all.