A method for carpool services includes obtaining a pending transportation service requested by a service requester. The pending transportation service may include a first origin and a first destination. The method may also include determining a first pick-up location and a first departure time from the first pick-up location for the pending transportation service based on the first origin and the first destination. The method may also include determining a target service provider based on the pending transportation service and a shareable transportation service that has been accepted by the target service provider and has not been completed.