This sounds nuts to me. Does anyone know of any instance anywhere in the world where such an idea has worked?
The Davies Commission looking at options for extra capacity in London has shortlisted a plan to extend the northern runway at LHR to at least 6,000 metres (c 20,000'), and to allow the runway to be used for takeoffs and landings, simultaneously - in effect, as they put it, "enabling it to be operated as two separate runways: one for departures and one for arrivals".
https://www.gov.uk/government/public...interim-report
