system
A chat on subreddit /r/PoliticalCompassMemes
human
Because they work, they reduce traffic a lot. People will actually use a bike for a lot of travel if it is a reasonable possibility
gpt
Whether they work or not is beside the point as far as the politician is concerned. They are quick, cheap, easy and highly visible. 

We will continue to see bike lanes go up in places they make sense, but not as a result of forethought or careful consideration; and we will continue to see bike lanes go up in places they don't make sense, but not as a result of malice or conspiracy.