The lines most affected will be RER line D and Transilien line R, with only one train in five running, and only during rush hour

Traffic on the RER, Transiliens and tramways operated by the SNCF will be ‘severely disrupted’ on Tuesday 21 May due to a strike by railway workers in the Paris region, which precedes a day of negotiations on bonuses for the Paris Games, the rail company announced on Sunday 19 May.

On RER A, one train in two will run on the Cergy and Poissy branches. RER B will see one train in two to the north and two trains in three to the south. On RER C, only two trains in five will run at peak times, with several stations not served. The RER D line will be heavily impacted, with only one train in five at peak times. The RER E will have two trains out of five, but will not run between 10am and 5pm, and many stations will not be served.

On the Transiliens, one train in three will operate on lines H, J, L, N and U. On line R, there will be one train in five only at peak times, with no service between Montereau and Melun via Héricy. On line P, substitute buses will be provided for the La Ferté-Milon and Crécy-la-Chapelle branches. Trams T12 and T13 will operate normally. On line T4, a tram will run every 15 minutes between Aulnay-sous-Bois and Bondy, but no trams will run between Gargan and Hôpital de Montfermeil. On line T11, a tram will run every 20 minutes.

The Sud-Rail and CGT-Cheminots unions launched this call for action, with occasional support from Unsa-Ferroviaire. Negotiations on bonuses for railway workers mobilised during the Paris Games are still underway, with a decisive meeting scheduled for Wednesday. At RATP, negotiations were concluded on Monday, giving staff an average bonus of €1,000 gross, rising to €2,500 for metro and RER drivers.