Originally Posted by
senatorgirth
I live in the "Megalopolis" and have never heard the term before to describe the Boston-Washington corridor. I didn't know that those in Flyover Country had given us that name

See, it's exactly because you live inside it! If you are a casual person living in Boston, why would you care about what's the weather is like in DC, unless you're traveling? At the most, weather people will only talk about traffic on the Masspike or I-95 doing down to NYC.
But for those from outside the area, they may look at it and see a bunch of very large cities all tied together for 400 miles. That's a megalopolis.
Similarly, Southern California is a megalopolis. But I think most San Diegans don't care too much what's going on in the San Bernadino Valley, even though they live in the same megalopolis.