Activists Install Plastic Safety Barriers Where Toddler Was Fatally Struck

Rows of flexible plastic posts now line the corner of Fourth and Channel streets in Mission Bay, placed not by city engineers but by a collective of neighbors and traffic safety activists who say SFMTA has done too little since a two-year-old girl was fatally struck there in late February.

Safe Street Rebel, a group with a documented pattern of installing unsanctioned street infrastructure following fatal pedestrian collisions across San Francisco, placed the lightweight plastic buffer posts at the intersection roughly two weeks after the child was killed. Her mother was seriously injured in the same crash. According to SFist's reporting, the driver ran a red light.

The group described its own rationale plainly in a statement: "After the city failed to make real changes, they installed lightweight plastic posts at the corner of the intersection, forcing drivers to turn more slowly and safely."

The installations are designed to mimic curb extensions, narrowing the roadway and tightening turning radii to reduce vehicle speed. Safe Street Rebel said in a social media post that the posts are made of the same materials SFMTA uses for similar installations. The group also detailed the intersection's structural hazards: a wide, skewed geometry that creates poor sightlines and encourages fast turns. Five streets converge at that point, making it what neighbors have long described as one of Mission Bay's most unpredictable corners for pedestrians.

SFMTA acknowledged the recent tragedy and confirmed it has made adjustments to the intersection, including changes to traffic signal timing and improvements to crosswalk visibility. But the agency also pushed back on the unsanctioned posts, saying the installations are unregulated and may produce unintended consequences. Whether SFMTA will remove the curb extenders or pursue additional engineering changes at the site remains unresolved.

People who live and work near Fourth and Channel had mixed reactions to the barriers, according to NBC Bay Area reporter Sergio Quintana, who examined the installations on-site. Eugene Cura, a local resident, voiced support, saying he wants the area to be safe for pedestrians.

Safe Street Rebel frames the posts as both a practical safety measure and a pressure campaign. The group has used the same tactic at other San Francisco intersections after fatal collisions, treating unsanctioned infrastructure as a way to force SFMTA's hand when official responses fall short.

The exact date of the late-February collision has not been confirmed through official records, and no charges against the driver have been publicly reported. SFMTA has not stated whether it will treat the current installations as a violation or incorporate them into a longer-term safety plan for the intersection.