my appearances before you are youtube channel called sfbrscom, san francisco board of supervisors public. you're welcome to peruse. thank you very much. >> thank you. next speaker. >>> thank you, supervisors. mark gruberg, with san francisco taxi drivers. i want to thank supervisor mar for the hearing he called last week over concerns about the operations of personal ride services. i wanted to follow-up on that. first, it's clear that although the state public utilities commission commission has asserted jurisdiction over these companies, it's the city's vital interests that are here at stake. safety and protection of residents and visitors, ensuring adequate service to the disabled, protecting the environment against pollution and congestion, ensuring the well-being of taxi drivers, low-income largely immigrant work force, and the health of the taxi industry which is an essential component of the city's transportation services. second, it's important to understand that these services could not exist without the underpinning of a taxi system that is obligated to serve the public as a who