Since 26th July 1889, a metre gauge railway connects the two main villages, Les Ponts-de-Martel and La Sagne, as well as a handful of small hamlets, to the watch-making centre of La Chauxde-Fonds. Unlike the vicinal railways in the neighbouring French part of the Jura, this railway has survived and is about to be modenrized once again.
The line
At La Chaux-de-Fonds (alt. 994m), the line is adjacent to those of the Chemins de fer du Jura leading to Franches Montagnes and of the CFF