. >> reporter: nicole schneider is with walk san francisco, a pedestrian advocacy group. she says the crosswalk business priscilla was in is along one of the city's more dangerous streets. >> for the first time umbrella vision zero to eliminate traffic fatalities in ten years, the city is working on a strategy. >> reporter: there are flashing ground lights along the crosswalk. but crash signals are coming. >> we're in the process of getting approvals by various city agencies and commissions. once that's approved it should be in by the middle of 2015. >> i made a call yesterday to expedite the pedestrian crosswalk signal for polk street where the fatalities happened. >> reporter: mayor lee offered condolences and released a statement saying, in part, this incident is tragic and reminds us that we all have a shared responsibility to protect and care for one another on our busy streets. this incident will be thoroughly investigated." >> we have a walkable city. but it needs to be safe for people. >> reporter: supervisor kim said she would like to see a signal here asap, at l