PARIS — Demonstrators have started marching across France in a new round of protests and strikes against the government’s project to raise the retirement age to 64.

Unions hope the action will the biggest show of force against the planned change.

Train drivers are among those who walked off the job on Tuesday across France to show their anger at the reform.

More than 250 protests are expected in Paris and around the country against President Emmanuel Macron’s legislation.

The bill is under debate in the French Senate this week.

Unions threatened to freeze up the French economy with work stoppages across multiple sectors.