representing the police department and traffic company also known as company -k we'll have sergeant pat toben rather than sergeant that's off trafficking the torch today. tough day for the police department. we're also joined by mary holland the m.t.a's parking enforcement agency. she's been with the city since 1979 when she started as a parking patrol officer and assists in the management of day-to-day operations of her division, planning and a ministering work and activity office senior parking patrol officers and officers engaged in parking enforcement and intersection control. last but not least we're joined by deputy or sorry, district attorney paul henderson that will help understand the enforcement related of prosecution of collisions. so, mary, please begin. >> good morning. as julian said i'm mary fo a lo on the security and enforcement division. in ours we have 271 parking patrol officers. 30 field supervisors and three assistant directors and what we do as it relates to pedestrian safety is we enforce parking regulations. those closely related are sidewalk parking, cross walks, bus