It could be that bare headed cyclists get noticed more? Where I live has mandatory helmet laws, so a helmeted cyclist is normal. If I see a bare headed cyclis

It could be that bare headed cyclists get noticed more? Where I live has mandatory helmet laws, so a helmeted cyclist is normal. If I see a bare headed cyclist, it strikes me as an unusual thing to see, and my attention is automatically drawn to him, and I will then carefully pass. If all cyclists were bare headed, maybe they wouldn't get noticed as much and the passing distance might reduce?