The building is linear, over 300m in length and 13m deep and structured like a huge train carriage at a halt. It is part of a piece of land characterized by a holding wall for the embankment with the platforms, which are approximately 6m high. This rise led the architect to design a building that responded to the need to erase the interruption between the two parts of the city and give back unity and consistency to the urban area.

The central part and the heart of the building is the large arrivals and departures concourse: here merge all the pedestrian routes leading from the square to the level of the trains, the services and the office area. Placed at an intermediate height between the square and the platforms, the concourse is rectangular in shape and of dual height. It overlooks both the square, through large windows, and the platforms, through a big glass window. A gallery runs along three of its sides, determining the office area.
The station has five raised storeys, of which the first two are mainly destined for passengers and the others for services and the railway staff’s offices.
In the main front the horizontal dimension has been emphasised by means of the overlapping of two separate layers: a base covered with visible bricks and with a line of coupled windows which light the interior concourse, and a cornice with the big barrel roof punctuated with the small windows of the offices. The appearance of the facades gives the perception of the interior distribution, and the relationship between the interior and exterior is even more clear in the two vertical brickwork bars of the stairs.
The main entrance is marked by an overhanging marquise – an element which on the opposite side from the platforms becomes the roof of the first platform.
The roof is made up of arches with three hinges in lamellar wood and is covered with copper-plate.