EUROCONTROL’s 2013 Challenges of Growth Report “by 2035 more than 20 airports are operating at 80% or more of capacity for 6 or more hours per day … drives ATFCM airport delay up from around 1 minute/flight in 2012 to 5-6 minutes in 2035.”Whereas social, economic and environmental constraints impede building new runways, secondary airports are hindered by technical, infrastructure and meteorologic ...