  This paper proposes an approach to analyze the impact of multimodal Public
Transit (PT), combining conventional fixed-route transit and Demand-Responsive
Transit (DRT), on equality in transport accessibility distribution. We
construct a graph model of multimodal PT in Neo4j, based on General Transit
Feed Specification (GTFS) data, modeling DRT analytically (using continuous
approximation). We quantify service quality on any location using an
accessibility measure, indicating how easily other places or opportunities can
be reached. We quantify inequality of accessibility distribution. We state the
problem of allocating a DRT fleet to minimize inequality and show its
NP-completeness. We showcase our approach on the transportation network of the
French town of Royan.
