Eventually that is just a poor signalization lol, I don't want to believe that the original idea was that people actually pass by that thin space with the bike.
I don't know if that's even a street travelled by cars, as it appears to be old brick. I an quite sure someone did that with chalk as a joke, or perhaps a dare. There are some nuts out there who would take such a dare.
They have some similar to this in Boise actually. They also have some that end abruptly with no warning into a sidewalk. Very dangerous at night if you're going fast and not familiar with the area.
Can't. Don't live in Boise. Too much cost and trouble to go back after fighting a ticket there. Plus I can't even cycle safely there so I won't cycle there any longer.