This year from 1st June to 30th september , there is a new day rover pass in the TER PACA region.
The ZOU ! Pass will cost 15 euros and is valid for unlimited travel on TER [local] trains within a single department of the Provence-Alpes-Côte d'Azur region
(ie 04-Alpes de Haute-Provence
13-Bouches du Rhône
buy online in advance here [nb select the correct departement] https:/…
or from ticket counters [you can buy any departement pass from the counters and also purchase in advance]
alos in the blue machines - but only for travel within the region the machine is standing in and only for travel that day