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This paper discusses a concept called "Paired Approaches" which is designed to facilitate approaches to closely spaced parallel runways (CSPRs) -i.e., runways separated by 700 ft to 2500 ft, in instrument meteorological conditions (IMC). Such runway pairs experience a significant loss of arrival capacity during IMC and marginal visual conditions because currently, runway pairs like this can only be used for simultaneous arrivals when pilots can provide visual separation. The basic procedure design, operations concept, the required cockpit tools and initial feasibility of the paired approach concept were developed in the 1990's and included real time pilot and controller simulations and evaluations. These initial simulations indicated that the Paired Approach procedure was feasible for both pilots and controllers.

The Collaborative Trajectory Options Program (CTOP) is a new type of Traffic Management Initiative (TMI) scheduled for initial implementation in March 2014. As part of a larger effort to enable quantification of the post-implementation impacts of CTOP on Traffic Flow Management (TFM), it is necessary to establish new data collection methods and baseline performance metrics. This paper describes the development and application of one of these new data collection methods: the ability to identify and classify flights routingout of current Airspace Flow Programs (AFPs). A route-out identification algorithm was developed to quickly generate route-out datasets using a combination of Traffic Flow Management System (TFMS) Aggregate Demand List (ADL), AFP Advisory, and Track Messages (TZ). The route-out identification algorithm was applied to all instances of AFP05 and AFP08 during 2012 to determine the routing behavior of controlled flights. Preliminary observations from the route-out dataset are discussed as well as the applicability of the observations to future CTOP assessments. The final results of this analysis are expected to be used as input to a set of fast-time benefit estimation simulations and ultimately a planned CTOP post-implementation performance assessment during 2014.

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