The movement of the wheelchair on stairs is a major technical problem on which work in many countries. A couple of years ago the Swiss developers were presents electrical model of a wheelchair called Scalevo. On the basis of its young engineers from Zurich have developed a new model called Scewo, which, in essence, is a modular system. In addition to the two large wheels for normal travel it is equipped with rubber tracks allowing you to ride up and down the stairs, and walk on ice, snow and small rubble.
Additional comfort: the chair is in a wheelchair can be raised, making getting around the city more comfortable.
Commercial availability of such wheelchairs is open to question, but the team is working in this direction. They are currently raising funds to Refine the next prototype and submit it by the end of 2018.