Documents a methodology for determining the resources required (i.e. vehicles and vehicle service hours) to provide demand-responsive transportation (DRT) for different levels of demand and different levels of service in a given service area. This report is accompanied by a software tool on CD-ROM (CRP-CD-40) that can provide a preliminary estimate of the number of vehicles required for a new or modified DRT service. An instruction manual for software use is also included on the referenced CD-ROM.