most instances, streetcar track needs to be paved with conventional
materials, such as cobblestone, asphalt or concrete. However, under
certain circumstances, the opportunity exists to "pave" streetcar track
with grass. Today, this is called "green" streetcar track. While this
concept has its origins on the St. Charles Avenue streetcar line in New
Orleans back in the 19th century, the Europeans have recently brought
this form of streetscape architecture to new levels.
A special "green" streetcar trackway along the west side of Furman Street would be ideal to service Brooklyn Bridge Park.
Here's some pictures of what a streetcar line through Furman Street,
Columbus Park and Cadman Plaza East or Richards Street could look like.
Of course for Brooklyn, I think we need a more traditional looking
streetcar, that doesn't resemble jet aircraft: