The strike remains eight hours or for the entire work shift for all public and private sectors.
There is an exception for transport where, following a back-to-work order, it has been reduced to four hours for local public transport, air transport and maritime transport.
CGIL and UIL on Thursday morning appealed to Lazio’s regional administrative tribunal TAR against the back-to-work order in the transport sector.
The order was issued by Deputy Prime Minister and Transport Minister Matteo Salvini.
The appeal was rejected, the transport ministry said later in the day.
Overall, rail transport had been excluded from the industrial action by the two unions.
Based on the ordinance signed by Salvini, the stop for planes, including air traffic controllers, will be from 10 a.m. to 2 p.m.
For buses, metro and trams, as well as for ships and ferries, it will be from 9 a.m. to 1 p.m.
Firefighters will also strike from 10 a.m. to 2 p.m.
Taxi services will be at risk for the whole day.
Unions are asking for salary hikes, more funding for healthcare, education, public services and industrial policies.
A total of 43 demonstrations have been organised across Italy on Friday with the secretary general of CGIL, Maurizio Landini, closing the protest in Bologna and the leader of UIL, Pierpaolo Bombardieri, wrapping up the demonstration in Naples.
ANSA