Provence-Alpes-Côte d'Azur daily basis, but cities are investing in public transport networks such as Marseille's subway (2 lines) and tramway (3 lines), Aubagne's tramway (1 line) and Nice's tramway (1 line). Other networks existed at the beginning of the 20th century in smaller cities such as Aix-en-Provence, Avignon, La Ciotat and Toulon but are now gone. Major universities of the region include the Aix-Marseille University, the University of Toulon, the University of Avignon and the University of Nice Sophia Antipolis. Other towns have higher education classes but no Universities. Provence-Alpes-Côte d'Azur Provence-Alpes-Côte d'Azur (; ; ; PACA) is one of the 18
Alpes-de-Haute-Provence difficult, especially in winter, and particularly the communes in the Arrondissements of Barcelonnette and Castellane. They are therefore quite isolated from the rest of the department and the region. National Highway N85 between Digne-les-Bains and Castellane passes through several narrow gorges including that of "Taulanne" which is especially narrow. There are several railway lines in Alpes de Haute-Provence. These are: Old abandoned lines: The families "Simiane", "Agoult", and "Ponteves", nobles of Provence Alpes-de-Haute-Provence Alpes-de-Haute-Provence (; "Alps of Upper Provence"; Occitan: "Aups d'Auta Provença") is a department in the Provence-Alpes-Côte d'Azur region in Southeastern France. Formerly part of the province of