SAN FRANCISCO -- Hours after a pedestrian died after being struck by a Municipal Railway bus, San Francisco motorcycle police officers were busy writing citiations during the Tuesday morning commute to drivers who failed to yield to pedestrians in crosswalks as part of a sting operation on busy Geary Ave.

The death was the 24th of the year in SF this year -- the highest toll in the state and among the top five nationally.

Officer Bob Guinan told KTVU that the sting was an effort to end a deadly game pedestrians and drivers wage daily throughout the city on such busy corridors as Van Ness Ave., Mission St., Geary Ave. and Lombard. Police wrote 120 citations over the course of four hours during Tuesday's operation at 11th Ave. and Geary, a large -- but typical -- number.

During a recent 9-day period, a crackdown at various intersections around the city resulted in more than 900 citiations, varying in cost from $155 to $371.

"Drivers are driving too fast -- they are inattentive, they are in a rush to get somewhere," said Guinan of the behavior pattern of those ticketed. "It's all too common to see people on cell phones, not paying attention...Drivers will see the pedestrian and then simply shrug their shoulders or give them a gesture."

On Monday, a woman near the busy intersection of Van Ness Ave. and Jackson St. became the city's latest vehicle-pedestrian fatality. Police Sgt. Neville Gittens identified the victim as 56-year-old Qiong Yu-Zhou and said she was hit by a No. 27 Muni bus.

Following the 6:30 a.m. accident, Yu-Zhou was transported to San Francisco General Hospital, where she died around 11 a.m.

Gittens said the accident was under investigation by the Police Department's traffic division and its hit-and-run division, which he said is standard for traffic fatalities.

The incident was not considered a hit-and-run and no arrests have been made.

"It's considered an accident," Gittens said.

Walk San Francisco spokeswoman Emily Drennen said the incident occurred near 1999 Van Ness Avenue at the southwest corner of Van Ness and Jackson.

Drennen said Steve Gerstle, a former Walk San Francisco board member who has worked toward improving conditions for pedestrians in San Francisco, saw the victim pinned and motionless under the bus.

Muni spokesman Alan Siegel confirmed the pedestrian was hit by a Muni bus but said Muni does not comment on accidents under investigation.

Walk San Francisco held a small demonstration Monday at the corner of Van Ness and Jackson to protest conditions for pedestrians along Van Ness Avenue.