From the NY Times:
On a stretch of Greenwich Street in TriBeCa, a construction site hummed with the usual activity. Workers encircled a crane removing dirt from a trench. Others mixed concrete in a wheelbarrow.
But nearby, men in dusty denim were uncharacteristically crouched on hands and knees, working beside a mound of cobblestones, finding just the right one to put into place.
As a result of a preservation rule that a thoroughfare in a designated landmark area, once altered, must be restored to its original state, this street and others in the neighborhood are being torn up and resurfaced with cobblestones as part of a large-scale reconstruction, expected to be completed in October.
Approximately 15 miles of cobblestone still remain in the five boroughs, according to the New York City Department of Transportation, mostly preserved in historic districts including SoHo, Greenwich Village and Brooklyn Heights. Now, a few cobblestone projects are under way around the city.
So, in SoHo, Greenwich Village and Brooklyn Heights even the streets are preserved. Meanwhile, back in Queens, if you want something preserved, the borough historian says you are "afraid of change"...