[Ol' Dan Tucker]

Absolutely. But unlike in my car, where I instinctively turn on my turn signals, I don’t signal when there are no cars around. Also, because I assume I am invisible to cars, I can have an attitude that my signal on the bike is superfluous, since I only do what I would do if the cars really could not see me. It is mainly a courtesy.

Courtesy, time of day or traffic conditions are not components of the law governing signaling your intentions while operating a vehicle on the road.

If you're (cyclists in general, not you specifically) are going to demand the right to operate as an equal on the road, then you're should be obeying the same laws as the other vehicles.

There are not any exceptions or exemptions for cyclists.

[RobRoy]

By all means, I should get a ticket if a policeman observs me violating the law.