The SFMTA's optimistic plan to resume normal service in the face of what they thought would be a less sick day of sick-outs apparently proved unfounded. Just hours after the transit agency told riders that vehicles would be back on the streets in their usual fashion, the agency has sent out an alert warning of even more crowds and delays due to a "large decrease in the availability of operators for light rail vehicles."

Muni riders should expect, the SFMTA says, "ongoing delays and missing service as the third day of the sickout continues." They say that all routes and lines feature missed and delayed service, vehicles that turn around suddenly mid route, and "crowding and waits of up to 60 minutes."

The big change for tonight's commute is on Muni Metro (that's the J Church, K Ingleside, L Taraval, M Ocean View, N Judah, and T Third). As of 3 PM Wednesday, the J, L, M and N will "operate on short routes with limited bus shuttles to the terminals."

J Church will operate between Embarcadero Station and 30th Street. Limited bus shuttle service will be provided between 30th Street and Balboa Park Station. Customers traveling between Balboa Park Station and 30th are encouraged to use BART or Mission Street routes.

K Ingleside will operate on its regular route.

L Taraval will operate between Embarcadero Station and 22nd Avenue. Limited bus shuttle service will be provided between 22nd Avenue and the Zoo.

M Ocean View will operate between Embarcadero Station and SF State. Limited bus shuttle service will be provided between 19th Avenue and Holloway and Balboa Park Station.

N Judah will operate on its regular route; however, some inbound N Line trains will be turned back at Embarcadero Station as needed. These adjustments will be made in the subway.

T Third will operate on its regular route.

Customers should allow extra time for transfers, Muni warns in an angry boldfaced font.

In terms of buses, Muni says that all Limited and Express routes will remain will remain in operation. The cable cars are still shut down, however, with shuttle buses serving their routes. And the F Market will continue to operate only between Fisherman's Wharf and the Ferry Building.

As has been the case all week, BART will let riders with valid Muni proof of payment ride between the Daly City and Embarcadero stations. And, as mentioned this morning, at least this week Muni's fare inspectors aren't there to shake you down: they're only there to provide customer service.

Good luck getting home! Let us know how it goes.

See all of SFist's Muni sick-out coverage here