Actually for such designing, M.Des course is a better one. You could study B.Arch but it mostly will be about building, construction. IIT BBy has a vehicle and mobility specialization in its M.Des programme. That can be a better add on to your graduation. Mind you you will have to get through CEED to get admissions. I dont think B.Arch will be much useful for your interest level. UCEED is the UG entrance for design programmes at II Bombay and Guwahati. IIIT Delhi and VIT are some that also tale the scores for admissions. Check these out before you make your decision. You can write to us for more clarifications