Paris taxi drivers protesting what they consider unfair competition from rival services such as Uber are joining teachers and other public servants in nationwide strikes and demonstrations.

Air traffic controllers are also on strike, and the civil aviation authority forecast 20 percent of flights would be canceled Tuesday.

Public servants are angry over a range of issues including pay, education reforms and working conditions.

Taxi drivers plan to block access to the capital's two main airports and then stage a go-slow procession into the city center.

The strike is the latest challenge to Francois Hollande's Socialist government.