Yesterday on the W&OD, I was passed just east of Ashburn by someone wearing a well-known local team kit who was using a bike bell as a his “passing, on your left” warning. One sharp ding, unambiguous and clealry audible (at least if you’re not wearing earbuds and don’t have the volume cranked up to 11). Got to experience it twice (he pulled off at the Smiths Switch rest stop and passed me again a bit further east). Kudos to you, sir!