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1. E. Hyytiä, A. Penttinen and R. Sulonen, Congestive Collapse Avoidance in a Dynamic Dial-a-Ride System, WIPO Patent Application, WO/2011/154613, 2011, Espoo, Finland (bib)

   Abstract: The invention allows avoiding congestive collapse in a dynamic dial-a- ride system. In response to a trip request received in a dispatching unit of a dynamic dial-a- ride system, vehicles of the dynamic dial-a- ride system are enquired whether they are available to accept the requested trip. In response to the number of the vehicles available to accept the requested trip being less than a predetermined threshold, the trip request is rejected. Only in response to the number of the vehicles available to accept the requested trip being equal or more than the predetermined threshold, the trip request is accepted, and the requested trip is allocated to one of the available vehicles.