A transportation service required by the Americans with Disabilities Act (ADA) of 1990 for those persons with disabilities and others not able to use fixed-route service. Generally, it must operate in the same areas and during the same hours as available fixed-route transportation. The fare is limited to twice the fixed-route fare. Complementary paratransit service may be operated by the fixed-route bus agency or by a completely separate agency. (Note – This is not the same as general paratransit service.)