Travelers grappled with another crippling wave of transport strikes in France on Sunday, as train workers protested President Emmanuel Macron's economic reforms and a stand-off between the government and rail unions hardened.

Train staff last week began three months of nationwide rolling strikes in a dispute over the government's planned overhaul of state-run railway SNCF, in the biggest challenge yet to Macron's attempts to modernize the French economy.

Talks between workers and ministers have so far hit a wall. Some unions are stiffening their resistance, while the government has dug in its heels on the main aspects of its reform, which include the end of job-for-life guarantees for rail staff.