Interesting!!! I think I would rather ride downhill or uphill to get the work out.
Maybe train or bus are not allow for carry the bicycle inside or use bicycles as parking for better security.
In Chicago, people can bring bikes on train if it is not during rush hour. I think the same for bus too.
The gif was not from Chicago. It's from somewhere in asian countries.
Smart, Save a lot space for parking.Look like it's in Japan. Japan usually have crazy gadgets.
It's possible the bicycles are rental or bicycle parking underground instead of on surface.
After a quick Google search - yeah, Japan and bicycle parking. See this link for depth detail on this bicycle parking. Japan Underground Bicycle Parking Systems
Smart, Save a lot space for parking.