Again, I ask the question, what public transportation? I worked in Billerica, MA; Durham, NH; Salem, MA; Danvers, MA; North Andover, MA and Andover, MA, during my thirty-year engineering career, and not one (1) of those locations was served by public transit! So while what you propose sounds great in theory, it would be a disaster in practice. The fact is that those highways, for good or for ill, were built, and they aren't going away, so how do you propose we all get to work, walk? Bicycle? I got news for you, it's not happening! People are voting with their feet, and it's planted firmly on the accelerator pedals of their cars, if for no other reason that transit only serves the urban core, not the suburban beltways.
The tech giants recruit from MIT and Harvard, but build their laboratories and factories in the suburbs, because land is cheaper and the highways have supplanted the railroads as the prime mover of raw materials and finished goods. That's not going to change anytime soon, either!