2 national airspace system performance and aviation activity 20 01 ace plan 16 this chapter contains a discussion of the includes statistics describing current projected at us airports it summarizes developments in services that may lead to an increase future 1 delay is traditional measure nas however delays are only summary interactions among capacity demand throughout during given hour if aircraft using airport sought service continuous rate equal which operations could be processed oper ating conditions were constant then reach s highest without significant air craft arrive depart never there periods when several same time none or therefore number actually processes usually less than high est
