Have you seen what the majority who are even able to buy a car in India buy? I wouldnt want to travel high speed in them, and suspect they arent even capable of high speeds. This is effectively for the wealthy who drive imported cars that are large by their standards.
Seems to me that a high speed rail system would make more sense. Maybe one will be built along side the expressway.
Other populous countries simply do not have great roads in quantity outside of Western Europe.
Making this project a true transportation corridor, with pathways for freight rail, passenger rail, trucking, pipeline and the highway. If they are going to disrupt the population then do it right.