On 31st May and 1st June, road traffic will be severely disrupted due to security measures for the Franco-African summit taking place in Nice.
In order to make traveling in the region easier, rail service SNCF is increasing the number of seats available by 3500 a day. It's also introducing an all day ticket for the regional TER trains tomorrow and Tuesday. Each day pass costs 5 euros and allows unlimited use of the TER network between Cannes, Drap and Monaco. Tickets are available from the automatic machines in Monaco.
Franco-African summit in Nice : changes to local train services [1]
Links:
[1] http://www.monaco.mc//Pages/cache/offonce/Accueil/monaco_actualites/toute_l_actu/depeches/sommet_franco_africain_a_nice___les_ter_s_adaptent;jsessionid=C36F43F968C138C8C86BAE653554A9DE.node1