Strikes by ATAC and Roma TPL in Rome on 4 December.

Commuters in Rome face yet another “venerdì nero” as trade unions representing public transport workers call two separate strikes on Friday 4 December.

A four-strike by Rome's public transport company ATAC is scheduled between 08.30 and 12.30, affecting buses, trams, metro and light rail services Roma-Lido, Roma-Giardinetti and Roma-Civitacastellana-Viterbo.

A 24-hour strike by Roma TPL, the capital’s suburban bus company, is programmed from 08.30-17.00 and from 20.00 until end of service.

The action by Roma TPL follows an unauthorised eight-day strike that caused major disruption to commuters in the outskirts of the capital from 23-30 November. The company's 2,000 employees were protesting over not being paid since September. However, after funds were made available from the city, Roma TPL returned to full service on 1 December.

Neither strike on 4 December will affect services provided by the regional bus provider Cotral or the state railway network.

The strikes come as Rome prosecutors open an investigation into alleged corruption at ATAC.

For traffic updates see Muoversi a Roma website.