Analysis of the systemic causes and consequences of extended aircraft taxi times at Chicago O'Hare International Airport (ORD).

It explains that the current inefficiency, known as the O'Hare Ground Movement Paradox, resulted from the O'Hare Modernization Program (OMP), which successfully reduced airborne delays by creating parallel runways but inadvertently placed them far from the central terminals, creating long taxi routes. The analysis details how this problem is compounded by immense traffic volume, severe Chicago weather (leading to surface gridlock), and the complexity of Air Traffic Control procedures.

The report concludes by outlining a multi-faceted strategy for mitigation, including implementing Collaborative Decision Making (A-CDM) technology and, most critically, the O'Hare 21 infrastructure program, which aims to centralize new gate capacity to physically shorten taxi distances.