The Metro B line will be closed for repairs starting at 6:30pm on Saturday night. There will be a replacement “MB” shuttle bus, but as with the Metro A shuttles, the bus does not always stop right at the Metro station, so check signs to be sure you’re waiting in the right place.
The repairs are supposed to wrap up in time for start of service on Monday morning, but that just happens to coincide with the latest transportation strike, scheduled for Monday, April 30th from 8:30-5pm, and 8pm until end of service. Buses, metro, light rails, and the Roma North train are all participating.