Carpooling has a long history as it had a boom in the United States during World War II, and later, in the mid-1970s, it was once again used as a solution during the oil and energy crises . However, in those days, without the technology available today, carpooling had to face many difficult obstacles, such as the need to develop a network of users and find convenient forms of communication. Gradually, the means used to organize the trips were changing from the telephone to other more flexible technologies like Internet, email and smartphones. Nowadays, there are many different carpooling platforms and services, but, even today, they can be considered in their early stages because none of them has reached a large mass of users.