The San Francisco Municipal Transportation Agency (SFMTA) informed customers that all service, including cable cars, was returning to their regular routes on Thursday.

Amidst the so-called "sickout," Muni service availability has steadily improved over the past few days, and was expected to provide approximately 90% of Thursday morning's service based on pre-service data. Muni operated at 54%, 61%, and 80% of total service on Monday, Tuesday and Wednesday, this week respectively.

A large number of transit operators had called in sick for three straight days starting on Monday, reducing service and stopping the cable cars. The sickout came after workers rejected a contract proposal union officials said would have resulted in a pay cut.

On Wednesday, a San Francisco City Attorney filed an unfair labor practice charge against the drivers' union — Transport Workers Union Local 250-A — saying their contract forbids strikes and work stoppages, the SF Gate reported.

The union's president said Tuesday the labor group has nothing to do with the sick calls and urged those who called in sick to be prepared to have a doctor's note. For the full story, click here.