Other: I walk a lot, usually with my dog. Many, many times I have been very startled by bicyclists passing without alerting me to their presence. I often have no opportunity to get myself and my highly reactive dog out of their way. If my dog (or I) changes direction, a serious mishap could occur. What I'd appreciate is a reasonable call out ("on your left") or the use of a bell. I would say that only about 10 percent of bikers actually do this. Could the city please engage in some education regarding biking etiquette? Could we please have some signage in parks, on trails, and places where people often bicycle?