For example, in the occasion of the mass demonstration in Genoa last autumn, 17/11/2007 - a protest against falsifying the history in trials related to the G8-Summit of 2001 - the movements managed to negotiate a deal with Trenitalia about special trains for demonstrators. The idea behind this is that people should have the right to express their opinion whether they have money to travel or not.
This time the negotiations seem difficult. This far Trenitalia has turned down the proposals.
I read that yesterday in Milan, hundreds of students gathered at the central railway station in an assembly, which tried to pressure Trenitalia to a deal about the trains. The assembly proposed a price of 10-15 euros for a two-way ticket from Milan to Rome and back. The persons in charge finally agreed to talk, but suggested a price of 60 euros, which was way too much for students whose income is low and precarious.
They didn't reach a deal, so the pressure towards Trenitalia goes on. In Milan, the students have set an appointment this Thursday at 3 p.m. at the railway station. The idea is to bring there all the people who want to go and participate in the demonstration in Rome. They say they are determined to reach Rome no matter what, and that they are prepared to shut down the train traffic if necessary. There are appointments also at stations of Parma, Pisa, Napoli, Firenze, Bologna, Venezia and Padova.
The Milanese faculties and universities in mobilization have a blog called Onda Anomala Milano (in Italian). Here's two videos about the Milanese efforts to guarantee cheaper trains for the mobilization of this Friday:
Videos from the student demos in Roma. Students try to occupy train station and are attacked by police.
Reasonable analysis of the Anomalous Wave: