San Francisco has required that all employers with 20 or more employees provide commuter benefits.
From the California Chamber of Commerce:
Beginning 120 days after August 22, 2008 [December 22, 2008], San Francisco employers with 20 or more employees must provide commuter benefits to employees who work at least 10 hours of work per workweek within the geographic boundaries of San Francisco. This includes offering employees at least one of the following transportation benefits:
1. A pre-tax election of a maximum of $110 per month, consistent with current federal law.
2. An employer-provided transportation pass (or provide reimbursement for) equal in value of $45 (or more) per month.
3. Employer provided transportation at no cost to employees.
Normally these types of regulations cause a big uproar in the business community, but I haven’t heard to much about it. I guess it’s just the cost of doing business in SF.