The French civil aviation authority DGAC called today on airlines to cancel 20 percent of their flights as a preventive measure ahead of the air traffic controllers' strike.
The controllers' unions want to be exempted from proposed changes to how salaries are calculated, which they say would hurt their purchasing power.
They also denounce the loss of some 1,000 jobs in less than 10 years.
Taxi drivers meanwhile have a separate beef -- competition from taxi app company Uber and other non-licensed chauffeuring services.
Protesters blocked highways, torched cars and attacked several Uber drivers and passengers.
Ahead of Tuesday's strike, the spokesman of the Taxis de France collective, Thierry Guichard, appealed for calm, saying on French radio: "We don't want any violent protests (because) that would be counter-productive."
Thousands of taxi drivers across the country -- who are also seeking compensation for their loss of market share -- are expected to observe the strike.
The leftist FO union says that, with inflation, a July 2010 freeze in automatic pay increases has cost civil servants eight percent of their purchasing power.
The striking unions also denounce job losses totalling some 150,000 since 2007, mainly before 2012, and say the hospital sector is especially in need of job creation.
