[mhays]

Here's a topic: The extreme length of Manhattan blocks makes the avenues much busier with pedestrians, because they're concentrated onto fewer avenues.

If there were twice as many avenues, movement N-S would be easier, but both pedestrians and retail would be more dispersed vs. concentrated. The city wouldn't feel as big.

On the plus side, in addition to the easier movement for pedestrians, the avenues wouldn't need to be insanely wide if there were more of them.