Commuters in San Francisco are facing a second straight day of delays and tourists will again have to do without the city's famed cable cars on Tuesday after city transit workers called in sick again.

The San Francisco Municipal Transportation Agency says it is running more service on Tuesday morning than a day earlier, but riders will still experience significant delays. Cable cars will not run.

The agency known as Muni runs buses, light rail and street cars in addition to the cable cars.

The union representing Muni drivers has rejected a contract that would give workers a raise of more than 11 percent over two years, but also require them to cover a 7.5 percent pension payment currently paid by the transit agency.

Workers are not allowed to go on strike. Muni has warned those calling in sick that they could face discipline.

More On This...