California&#x27;s high speed rail project is estimated to cost $70B. That&#x27;s like 15% of Google&#x27;s entire market cap... I&#x27;m not sure trains (esp. in the Bay Area) are within the capability of even the largest internet companies.  Plus: You&#x27;d probably require some level of imminent domain to seize land -- which would be wildly unpopular and generate a lot of bad PR.