Air Travel Booms Hinder Air Travel Speed

Why hasn't air travel gotten faster since the 1960s? TPG dug this article out of Quora, and the answer is, as is generally the case, government regulations. Apparently the loud noise of sonic booms have been outlawed over land in the US. As for overseas travel, the US also limited the development of speedy aircraft to high-capacity carriers, instead of allowing the private jet business market to try its hand at the game. This might all change soon, though, as technological advances have allowed the possibility of high speed aircraft to be built bigger and cheaper than ever before.