It's simply not needed in my judgement (in my place, time, circumstances, biking speed, traffic, road layout, route, car drivers are used to it, weather, qualit

It's simply not needed in my judgement (in my place, time, circumstances, biking speed, traffic, road layout, route, car drivers are used to it, weather, quality of bikes, etc. etc.). Millions of others, bicycling day in day out, think the same way. They're not all dumb.