> I believe one end of the Houston metro area to the other is almost as far as London to Birmingham. One end of the London metro area to the other (say, from R

> I believe one end of the Houston metro area to the other is almost as far as London to Birmingham. One end of the London metro area to the other (say, from Reading to Southend-on-Sea) is almost (half of the distance) as far as London to Birmingham. Both London and Houston seem to have metro areas of maybe almost 100km in diameter.