The intersection of Flatbush, Atlantic, and Fourth avenues is in some ways the center of Brooklyn, sitting atop the borough's largest transit hub. It's also overrun by cars, funneling traffic to the BQE and the free East River bridges.
Fourth Avenue is far and away the most viable potential bike route linking Bay Ridge, Sunset Park, and Park Slope, but it's still scary to ride on, with no designated space for cycling. At 4.5 miles long, a protected bike lane would make the reconstructed Fourth Avenue one of the most important two-way streets for bicycle travel in the city, connecting dense residential neighborhoods to jobs and schools.
This morning, Doug Gordon, a.k.a. Brooklyn Spoke, tweeted this photo of westbound Ninth Street between Sixth and Fifth avenues. Drivers routinely take over the bike lane here and force cyclists into traffic. It's a scene that Mayor de Blasio must see on a regular basis.
Many people at last night's Brooklyn CB 6 meeting wanted a more ambitious redesign for Seventh Avenue, but that doesn't seem to be on the table.