A "guerrilla safety group" has installed new, unsanctioned safety measures at a notoriously dangerous crosswalk near the Panhandle.

SF Weekly reports that the San Francisco Metropolitan Transformation Agency, or SFMTrA, have installed lightweight barrier poles at the intersection of Baker and Fell. That crosswalk was in the news last week, as 90-year-old David Grinberg was struck and killed by a motorist who "floored it" through the intersection when the light turned green.

The poles themselves are set up in such a way that it forces drivers to turn at a much wider angle as they come onto Fell street. It also extends protection from the sidewalk into the crosswalk itself a few feet, affording pedestrians a bit more visibility, and thus, protection from motorists.

The safety group wrote about the installation on their blog, connecting it directly to Grinberg's death. After criticizing the city's inaction, describing their response as "thoughts and prayers," they shared their own thoughts:

We at SFMTrA were not satisfied with this response, and the absence of any action to make this and other crosswalks safer immediately. We believe that urgent and pro-active action is necessary to protect vulnerable street users across San Francisco.

So we got out our prototype materials and created a safety pilot. 10 posts and some spray paint = about $300. We dedicate this installation to the residents at Mercy Plaza at this intersection and we hope that it slows traffic on Fell street and makes pedestrians in the crosswalk feel safer.

As with any guerrilla-type installation placed without city permission, the poles will be pulled out soon. Paul Rose, a spokesperson for the SFMTA, told the Examiner, "Consistent with the vast majority of cases where we see these posts installed, we are obligated to remove them." He also provided reassurance that they're looking into additional safety measures for the area.

Related: Map: SFMTrA Safety Vigilantes Install More Bike-Lane Posts Under The Cover Of Night