From an article today:
For now, the line is closed in its entirety. Until February 27, the transport is full bus from Saint-Jean-Pied-de-Port to Bayonne. From that date, the Bayonne-Cambo section will be operated with a TER but the link Cambo / Saint-Jean-Pied-de-Port will always be provided by bus until October, 2015.
On completion of the work, the train speed of 70 km / h on the whole line will save time on the estimated path about 55 minutes.
"It's a little disturbed period for users, says one of the agents, but they are understanding because they know that it is only provisional. You have to know to go through it and then offer a service worthy of the name to the inhabitants of the Basque Country within.