French strike chaos deepens in crucial week for Macron

France's transport chaos deepened on Monday on the fifth day of a nationwide strike over pension reforms, ramping up tensions at the start of a crucial week in President Emmanuel Macron's battle with trade unions.

With only two of the Paris metro's 16 lines running as normal and suburban trains also heavily disrupted, many commuters slipped behind the wheel to try to get to work in torrential rain, causing major gridlock.

By 9 am, the tailbacks in the Paris area ran to 600 kilometres, twice the normal level, the Sytadin monitoring website said.

Large queues formed at bus stops following an announcement that one out of two buses would be running but striking workers blocked seven out of 25 bus depots, leaving more travellers stranded.

With many having opted to work from home last week and only now returning to the workplace, this week will test public support for the strike.

A poll on Sunday in the Journal du Dimanche newspaper showed 53 per cent of the French supporting the strike or expressing sympathy for their demands, up six points in a week.

Unions have called a second day of mass protests for Tuesday, a day before the government unveils the full details of its plans for a single points-based pension scheme that does away with dozens of more advantageous plans enjoyed by train drivers, sailors, lawyers and other professions.

Critics argue that the shake-up will require people in both the public and private sector to work longer for a smaller retirement payout.

Teachers are expected to walk out again for the second time in a week Tuesday, leading to widespread school closures.

Firefighters, electricity workers and "yellow vest" anti-government demonstrators have also joined railway workers in the streets in recent days.

The government's pensions envoy Jean-Paul Delevoye, who drafted the reforms, and Health Minister Agnes Buzyn will meet with trade unions on Monday to try to negotiate an end to the deadlock.

But the unions have sounded an uncompromising note.

"I will not negotiate over the implementation of what I describe as a monstrosity which endangers tomorrow's pensioners," said Yves Veyrier, the head of the militant Force Ouvriere union.

The strike has squeezed retailers in the run-up to Christmas, raising the prospect of another bleak year-end after the unrest caused by the yellow vests in late 2018.

The first day of the stoppage already caused an average 30 per cent drop in sales, according to the Alliance of Commerce, which represents 27,000 supermarkets and clothing and shoe stores with almost 200,000 workers.

A hotel association said reservations in the larger Paris region dropped by 30 to 40 per cent on the first day of