I see a lot of people riding bicycles on pedestrian sidewalks in Adams Morgan, sometimes at high speeds. This poses a danger to pedestrians. I witnessed a bicycle striking an elderly pedestrian at the bus stop on 16th St a few months ago. As she fell, I saw her head strike the concrete. Despite her assurances that she was okay, she was bleeding profusely from her head and we called an ambulance to checked her out. The issue is not a lack of bike lanes. Bikers often ignore the bike lane, preferring to ride on the sidewalk. What can be done about this?