Very soon, Muni riders will be bombarded by information about route and schedule changes.

Muni chief Nathaniel Ford announced Monday a massive outreach campaign to warn riders in advance about the service changes, which begin Dec. 5. Beginning this week, newspaper ads, on-vehicle voice announcements and NextMuni alerts will announce the changes, which affect more than half the bus routes and one rail line.

The changes include discontinuing routes and nixing route segments with low ridership, running fewer buses on less-crowded routes and ending some lines earlier. Muni will also increase service on heavily traveled routes and expand limited-stop service. 

Riders can find a chart of the changes at www.sfmta.com. Signs and banners will blanket Muni stations and brochures will be distributed.