@B.R. Malik. I saw that program too and in fact he was talking about two different things which got mixed up in the conversation. When he was talking about road infrastructure, he mentioned the construction of 10 lane signal free expressway till rawat. In the same flow he also stated that they will also extend the routes of metro bus from rawat to aabpara and from wah and taxila also. I don't think he mentioned margalla avenue.
Plus, you can be certain that the rawat to aapbara/zero point project is quite likely to be the next one as it mostly covers the constituency of Ch. Nisar i.e. NA-52.