It looks like the tractor-trailer idling on Friday on the Dean Street sidewalk between Flatbush and Sixth avenues left a memento: some oil or fluid, as shown in the photo below, via Atlantic Yards Watch . It's a reminder that staging construction on public sidewalks might have some unintended consequences and a spur for city and state overseers to take action.
This watchdog blog, by journalist Norman Oder, covers the project to build the Barclays Center arena and 15-16 towers at a crucial site in Brooklyn. Dubbed Atlantic Yards by developer Forest City Ratner in 2003, it was rebranded Pacific Park Brooklyn in 2014 after Shanghai-based Greenland USA took a majority share. Forest City left in 2018. Eight towers and the arena have been built. After a stall, Cirrus and LCOR in 2025 took over as master developers. A plan to complete the project is pending.