The work from student researchers Saeid Rasulkhani and Ted Pantelidis will be presented at the Tenth Triennial Symposium on Transportation Analysis (TRISTAN X) on June 17-21 at Hamilton Island near the Great Barrier Reef in Australia. The NSF-funded (CMMI-1634973) research is entitled “A many-to-many stable matching cost allocation model for multimodal Mobility-as-a-Service”, where we develop a novel methodology to extend earlier work to handle cost allocation analysis for multiple operators splitting a traveler’s trip. This ongoing work has resulted in major breakthroughs in facilitating design of integrated services between different operators and transport agencies within a true “Mobility-as-a-Service” setting, providing to them a tool like how the classic “traffic assignment problem” helped roadway planning in the last few decades. We are finalizing our computational experiments and will be submitting this to a journal for publication.