Just wanted to give you kudos on the way you handled that interaction. You know your rights, but you talked to the officer in a respectful manner. You gave your peace, and allowed him to give his. As you obviously know, the "heat of the moment" is not a time to decide who is right or wrong (that's what court is for), but simply a time to assess the situation and determine the facts. If only more people conducted themselves like that, society would be much more civilized. This video was a breath of fresh air as opposed to the countless videos I see of vigilante cyclists with a chip on their shoulder trying to provoke an officer wrong and screaming about their "rights". In fact, you had the sense to not unintentionally provoke him by making him aware of your upcomming left turn. Bravo to you.