The document discusses a proposal for a Personal Transport Assistant (PTA) that would give passengers more control over their public transportation trips. The PTA would be a mobile phone application that provides a personal travel plan with real-time updates on vehicle locations and arrival times. It would also send alerts about departures, transfers, and arrivals. The goal of the PTA is to shift travelers away from private car use by making public transportation more convenient and passenger-controlled. The proposal outlines partnerships and a development timeline to launch a PTA pilot program in Amsterdam in 2009.