Originally Posted by CarbonSink62
And Wikipedia says that a bitt is the same thing as a bollard; then goes on to define a lot of things as 'bollards' that are clearly not bitts. (i.e. lighted traffic posts).
I think of bollards like this:
And bits like this:
Davey & Company Bronze Mooring Bitt
The bit has more of a pin on it that can bite ("bit") you and a bollard is more round.