Trolley bus on Line 6, from Steuart and Market to Quintara and 14th Ave.
Most bus lines are scheduled to operate every five to fifteen minutes during peak hours, every five to twenty minutes middays, about every ten to twenty minutes from 9 pm to midnight, and roughly every half hour for the late night "owl" routes.
On weekends, most Muni bus lines are scheduled to run every ten to twenty minutes. However, complaints of unreliability, especially on less-often-served lines and older (pre-battery backup) trolleybus lines, are a system-wide problem.
Several regional bus systems serve San Francisco from the immediate suburbs: