I both bike and jog on the Custis Trail. This thread well represents the biker viewpoint. I wanted to give some from the ped viewpoint. Only about 20% will give me an audible warning. I acknowledge my gratitude with a hand wave. Once in a while, the silent biker’s bike makes noise so I can hear it coming despite lack of audible. Most times, whizzing bikes startle me, especially when they pass really close to me when I’m jogging. I try to yell out “Give warning” as they pass, but they are out of earshot too soon. I wish all bikers would issue audibles. Is there some way to remind all bikers to do this? I’ve thought about wearing a sign on my back “BIKERS: GIVE AUDIBLE WARNING” but worry that may backfire on me. Any thoughts?