Two years ago (when I visited), the international terminal at the airport in Bombay was also undergoing major construction. I saw a lot of construction of multi-lane highways outside of Bombay, probably because private auto ownership is growing by leaps and bounds.
It’s good they are aware of the issue and trying to improve things. It is such an amazing country. Thought I was long past culture shock till my first day in one of the poorer sections of Mumbai. Then wham! Like being transported to a different planet.