This report describes the complexities involved in creating an accurate eligibility determination process that complies with ADA requirements and is regionally and politically feasible to implement. This study documents the range of out-comes produced by the different eligibility certification models and offers information about their overall effectiveness. This report also focuses on the range of eligibility certification models that have been adopted nationwide. It presents information in order to generate new approaches for transit agencies attempting to enhance existing procedures. This synthesis will be of interest to transit agency general managers, the appropriate special services staffs, and any others dealings with ADA paratransit eligibility certification on behalf of transit agencies.