A reduction in CO2 and other greenhouse gas emissions related to transport requires a reduction in total km driven by private vehicles. This is difficult to achieve in rural areas because public transport provision is sparse. A redesign of public transport is required to provide people with alternatives to driving. This paper assesses the improvement to the availability and quality of transport options in two areas in the UK and France where demand responsive transport (DRT) is introduced. It calculates the increase in population served, the increase in service speeds, frequency, and span in order to assess the potential for car trip replacement and associated emissions reductions.