From the city that has banned cars from broad swaths of Broadway and put picnic tables in Times Square, here comes another great reshaping of New York’s streetscape.

The Bloomberg administration is moving ahead with what amounts to a radical, river-to-river reimagining of another major corridor: 34th Street, the Midtown thoroughfare that is home to Macy’s — and some of the city’s most congested traffic.

Automobiles would be banned on the block between Fifth Avenue and Avenue of the Americas, creating a pedestrian plaza bookended by Herald Square and the Empire State Building.

The result would be a street effectively split in two.

On the west side of the pedestrian plaza, all car traffic would flow west, toward the Hudson River. On the east side, all car traffic would move east, toward the East River. Buses would still operate in both directions, and through the pedestrian plaza as well, but in dedicated lanes separated from passenger cars by a concrete barrier.