French infrastructure manager SNCF invests 55.5 million euros for the modernisation of the ‘Ligne des Horlogers’ (Watchmakers line) between Besançon and the Swiss border. From March 1 to October 31 2021, the tracks of the mountain line will be renewed and the signalling will be modernised. The works should enable to increase the regularity of the regional trains to Switzerland and reduce car traffic at the border.