We have a winner. The Park Slope Civic Council has selected a winning design from their competition for the entrance to Prospect Park at Third Street (now closed to traffic).
Jordan Yamada and Peter Zahatros of Manhattan came up with the top pick, Stone Garden, which consists of a variety of stones set on a pair of bronze roller bearings that can be repositioned for emergency vehicle passage.
It’s kinda hard to describe but the illustration is a big help. The city will have to approve the design before construction begins. You can see the other designs that were considered on the PSCC website.