The "idea" ISTR (it is a while ago) was to tarmac the lot - not enough money as I also have a memory that it was not all "MPA" money for the road but also some FI Govt cash, and they were "short". Plan "B" was to tarmac the hilly bits and gravel top the flat bits - so boyo comes charging down the tarmac bit and hits the gravel and hey presto! Storm ditches don't help, as they don't alongside the airfield road, which certainly used not to be wide enough for two standard RAF coaches to pass.