via the northern suburbs of Amsterdam. Regional bus operator Keolis operates line N22 from Leidseplein and line N23 from Central Station hourly towards the city of Almere. Rotterdam (Suspended due to Covid-19): Metro: On Friday and Saturday nights RET operates all metro lines until 1:30 a.m. instead of 12:30 a.m. The majority of the metro lines do not operate their entire daytime length, as some stretches of line are served by other lines. Some stations are not served as some municipalities along the metro lines are not willing to pay for the night service. Night bus: City transport operator RET operates the BOB-Bus network on Friday and Saturday nights. The BOB-Bus network consists of 15 lines which start at the Central Station and radiate outwards to the suburbs and cities and towns in the region. Line B1, B2, B3, B4, B5, B7, B8, B9, B10, B11, B13, B16 and B19 operate both nights and line B17 and B18 operate only on Saturday nights. On Friday nights the majority of lines run every hour, with some lines running a few buses a night and some lines running every 30 minutes. On Saturday nights the majority of lines run every 30 minutes, with some lines running a few buses a night and some lines running every 20 minutes. Regional bus operator Connexxion operates line 860 and 867 on Saturday nights towards the municipality of Hoekse Waard. Both lines run twice a night and depart from the Central Station. Poland Warsaw: The Public Transport Authority (, ZTM Warszawa), branded as Warsaw Public Transport (, WTP), is a local authority controlled body which manages all means of public transport in Warsaw. Bus transport in Warsaw includes approximately 43 night lines which run between the hours of 23:00 and 05:00. and are numbered N01 to N95. The basic bus connections make up a network of lines joining remote districts with the centre, serviced every 30 or 60 minutes. The routes converge by the Warszawa Centralna railway station (Central Railway Station) which enables passengers to change lines if needed. All night buses (except the N01, N02, N03, N50, N56 and N58) depart 15 and 45 minutes after each full hour (from 23:15 to 4:45) from the loop at the Central Railway Station, or the Roman Dmowski Roundabout (pl) aka bus stop. Fares on night buses are the same as for day lines. Krakow: ZTP also manages