Decades from now, the optimal solution will be the Hyperloop for distances under 1000 miles, and an electric supersonic jet for distances over 1000 miles. Provi

Decades from now, the optimal solution will be the Hyperloop for distances under 1000 miles, and an electric supersonic jet for distances over 1000 miles. Provided that nothing bad happens to Elon Musk and he decides to found companies to make those things a reality.