Comment by shmat

Sometimes new techniques turn out to be a disaster. I-495 in Massachusetts was built using a new technique for concrete roadways. Concrete is normally not used to build roads in New England because it doesn't handle frost heaves. The new technique "solved" that problem. The result was that every inch of I-495 has had to be rebuilt. Even worse, the first "rebuild" was to lay asphalt over the concrete and then subsequently everything had to be ripped out and done again.