The tram is a means of passenger transport that circulates on rails and on the surface in urban areas, on the streets themselves, often without separation from the rest of the traffic, without a track or a reserved area.
The tram had a considerable development between the beginning of the 20th century and the interwar period with the innovation of electric traction, the multiplication of the lines and the increase in the number of passengers, becoming the main urban transport. The transport by horse had disappeared practically of all the European and American cities around 1910, and the buses still were in phase of development, increasing their mechanical reliability, but still they did not surpass the tram in benefits, whereas the automobile was still (for little time) reserved for a limited clientele. A great benefit of this type of means of transport was Improvement in the concession of economic centers with urban centers and residential areas.
