A project like this is very good and an economical blessing throughout the route. That’s take 1.
Take 2 is it becomes a crime ridden trap for travelers complete with roadblocks by thieves, murderers and of course the police for shakedowns. Kinda like driving from San Diego to Cabo San Lucas.
Take2 won’t happen — they’ve had the Bombay-Poona express of around 200 km open for over a decade and nothing of that sort. Ditto for the expressways from Delhi