DeKalb Junction is widely considered the bottleneck of the Brooklyn subway system, creating massive delays as multiple train lines converge at grade. To fix this mess, the video proposes a de-interlining plan that swaps the B and N trains to simplify tracking, creates a new storage yard at 38th Street to allow the R train to run to Coney Island via the West End line, and builds a new flyover to turn around local trains without blocking express service. By rearranging how these trains operate, the proposal promises a significant capacity increase across the 4th Avenue, Brighton, West End, and Sea Beach lines, aiming to transform one of the city's worst transit chokepoints into a faster, more efficient commute for local riders.
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