Ball, Michael O.Hoffman, Robert L.Chen, Chien-YuVossen, ThomasCollaborative Decision Making (CDM) embodies a new philosophy for managing air traffic. The initial implementation of CDM in the US has been aimed at Ground Delay Program Enhancements (GDP-E). However, the underlying concepts of CDM have the potential for much broader applicability. <p>This paper reviews on-going and proposed CDM research streams. The topic areas discussed include: ground delay program enhancements; collaborative routing; performance monitoring and analysis; collaborative resource allocation mechanisms; game theory models for analyzing CDM procedures and information exchange; collaborative information collection and distribution.en-UScollaborative decision makingground delay programcollaborative routingcollaborative resource allocation mechanismsperformance analysisgame theoryair transportationair traffic flow managementSocietal Infrastructure SystemsTechnical Report