For what it's worth, here's the standard reply:
''Speed Cushions on Perimeter Road South
Thank you for contacting us concerning Perimeter Road South. Health and Safety is paramount at Gatwick Airport and no doubt you are aware that there have been numerous traffic incidents in this area due to speeding drivers. Traffic calming measures were implemented in June 20011 which consisted of a kerb built out and thermoplastic rumble strips. Regrettably, drivers ignored these measures and continued to speed causing further traffic incidents. It was therefore necessary for us to employ a professional consultants to undertake a risk assessment and find a solution that would 'force' drivers to slow down .
The conclusion of this assessment has been the speed cushions. Set at an industry standard of 75mm height with minimum gaps of BOm, it is estimated that drivers will be forced to reduce to 13.7mph. The height and amount used are completely necessary to ensure that drivers reduce speed and do not accelerate significantly after driving over the speed cushions.
We appreciate your comments and concerns regarding the new traffic calming measures, and do assure you that it has been completely necessary to install them. If drivers adhere to the road conditions, slow down and drive safely over them then no adverse damage will occur to the vehicle.
We will continue to monitor the area and answer any questions that you may have. I would like to thank you for making us aware of your concerns and assure you that health and safety remains our number one priority.''
Yours gloomily,
mcdhu