Unions had promised a 'Black Monday' of disruptions in their long-running dispute over proposed changes to the French pension system.
On Monday the French parliament, the Assemblée nationale, will start debating the changes, which propose replacing France's currently highly complicated system with a single, universal system.
The government says the universal system would be fairer and more transparent, and would benefit people on very low incomes and women who take time out of work to have children.
But unions say the changes will leave people working longer and for smaller pensions.
The changes propose to leave the legal pension age in France at 62, but only grant full pensions to people who work until they are 64.
They would also do away with the 'special regimes' which allow many workers, particularly in the public sector, to retire earlier – some train drivers can currently retire from the age of 55.
President Emmanuel Macron's ruling La République en Marche party has a majority in parliament so the proposals are expected to pass in the end, although 40,000 amendments to the bill have been proposed.
On the Metro no lines are closed but some lines will be running fewer trains than normal
Line 1: normal.
Line 2: two trains in three of the normal services
Line 3: normal.
Line 3bis: normal.
Line 4: two trains in three
Line 5: one train in four in the morning, one train in three in the afternoon, last service departs at 9pm
Line 6: normal.
Line 7: three trains in four
Line 7 bis: normal.
Line 8: three trains in four
Line 9: normal.
Line 10: normal.
Line 11: normal.
Line 12: one train in two
Line 13: three trains in four
Line 14: normal.
Traffic on the bus and tram network is running as normal while RER line B – which connects Paris to both its main airports – is also running as normal.
Elsewhere on the RER network all lines are running as normal apart from Line H, which is not running between Pontoise and Creil – a substitute bus service is in place.
Across the rest of France, SNCF is not reporting any strike-related disruption on the train network, although there us some disruption in northern France related to Storm Dennis.
There is also a protest planned in Paris, organisers are calling for people to meet at 1.30pm at the Place de l'Opéra in the 9th arrondissement and march towards the Assemblée nationale building on the other side of the river.