This disclosure relates to a method, article of manufacture, and apparatus for rideshare. In some embodiments, this includes receiving at least one participant data, at least one vehicle data, and at least one trip interest, wherein each of the one participant data comprises a personal communication device identifier associated with a personal communication device, forming a contract for a rideshare trip among participants, wherein the contract includes trip cost payment terms and alternative transportation cost payment terms in case of a plurality of contract transactions, monitoring from a rideshare platform a performance of the rideshare trip, based on the performance, calculating costs associated with the rideshare trip and determining contract transactions according to the contract, performing the contract transactions, and allocating carbon credits in the rideshare trip.