pacity can be expensive, although technology can allow for increases in capacity at reduced costs. Behavior. Inadequate behavior of drivers or passengers can lead to delays in transporta- tion. Examples for drivers include speeding, compulsive lane changing, and texting while driving. Examples for passengers include pushing and blocking, which can occur in different circumstances. Potential interventions for restricting inadequate behav- iors and promoting positive behaviors include education campaigns, fines, real-time information and social participation [120]. Infrastructure and technology. Infrastructure such as freeways, public transportation, bike lanes, and vehicle sharing systems can contribute to improve mobility. Technology can complement infrastructure, by enhancing its capacity. For example, traffic sensors can be used to coordinate traffic lights, avoid traffic jams, and suggest alternative routes. Society. In most societies, owning a car implies prestige, reflecting certain economic suc- cess. However, people are becoming so successful that roads are saturated. In several cities, people naturally prefer alternative modes of transport. With a social accep- tance of car-owning alternatives, it will become easier to balance different modes of transportation farther from private cars. Planning and regulation. Even when urban planning has limitations, cities suffer when there is no urban planning at all. In many cities this is complicated because politicians and not urbanists make the decisions on urban projects. Also, some cities do have planning and projects, but there is no enforcement nor regulation. Thus, plans never materialize and projects never are implemented. There are different actions that can be taken to improve different aspects of the eight factors mentioned above. For example, more capacity can be built. But if the quantity 9