mr. tom maguire and ricardo, aleja as well. >> thank you. i'm tom maguire i oversee the sustainable streets division at the mt a. perhaps the most important part of our mission is the achievement of vision zero. i'm really excited to see the board of supervisors following on its historic commitment to vision zero we of course share and i thought your comment supervisor mar that the culture of speeding on the streets is appreciated and we'd like to use initiatives like vision zero to replace that culture of speeding with a culture of safety and also i want to thank you for your research and i took a few take aways from that and speed really matters it matters for reducing the the severity of crashes and the importance of combining enforcement education and engineering together which is the vision zero approach but combining those 3 together to achieve a safety outcome and of course the importance of automated safety enforcement and that's a tool that maybe as we embark on a conversation about what the right speed limit is here in in san franc