It is a general trend in transportation planning to try to minimize the negative externalities of thetransport system as a whole, such as noise or pollutant emissions. One of the ways to achievethis is to reduce the number of cars on the roads, for instance by increasing car occupancy. Thispaper focuses on evaluating the potential of this possibility. The factors influencing this potentialare manifold: behavioral, structural (number of potential matches), organisational (quality ofavailable services to meet co-travelers). . .In previous studies, mainly the behavioral and organisational factors were analyzed. Thispaper focuses on the structural factor. To do so, the highly detailed daily plans generated by themulti-agent microsimulation software MATSim are searched for potential matches. Informationabout the potential matches is used to assess the feasibility of carpooling. In particular, it isshown that when considering only structural factors, it is possible to group most of the car tripsinto two-person car-pools.The results of the analysis lead to the conclusion that there is no structural obstacle tocarpooling development, and thus that the causes of the low share of this mode is to search inboth the behavioral and organisational factors.
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