Assistance for Bicycle / Assistance Facility

This design is to solve the problem where bicycle going upstairs conveniently.
The track provides a metal path and it is better for people take their bicycles
to their flat.
Usually, the railing of stairs and the track look like a unity. The track
will be seperated when people need a track to pull the bike, on this way,
people don’t have to carry a bicycle to go upstairs precariously. It helps
improve people’s security and the way of going upstairs of bikes.