if there's -- if there's no further questions i want to introduce megan weir with the department of public health and a leader on vision zero, to talk about data and analysis. >> supervisor yee: thank you and stick around, because i do have questions. good morning, megan. >> good morning, supervisors. thank you so much for your attention to vision zero and the opportunity to speak today. my name is megan weir, the co-chair of vision zero with haba, and i also lead the data systems work for vision zero and work closely with my colleagues at d.p.h. also to advance the community engagement and equity through this work. so i'm going to be sharing some of our work on that. and just to reiterate, again, that the increased risk of seniors, particularly to fatalities, 50% of our pedestrian deaths last year as people have noted were seniors. and we know in looking at the data from the hospital that seniors are almost twice as likely to have a severe injury compared to younger adults. so in our medical population we see seniors disproportionately represented. this was a national study that looked at