Both types of collaborative solutions have been increasingly used since the beginning of the economic crisis, thanks to technology 2.0. They are applicable in many different cases, but are especially useful in environments and situations like universities, holidays, long journeys and urban centres. This is because, in these cases, both owners and passengers of vehicles have the same motivations to consider the carpooling solution. Their main goal is usually to share the cost of fuel, but they might have other reasons, such as trying to avoid parking problems, wanting to talk, meet new people or make a contribution to environmental protection.