That's what happens when you design the infrastructure to preserve street-level aesthetics instead of something more robust and functional. At this point, no one seems to be willing to change the infrastructure to something actually reasonable, even though doing so would allow for designs that permit both easier rebalancing of train throughput and a way to allow people to reach homes/businesses north of Eastern Parkway's main road without having to cross in front of cars on said main road, especially if they have some form of mobility impairment.
Speaking of poor designs, I'd really like to bring up 142nd Street. Instead of proposing a flying junction with southbound trains diving under trains, they thought it better to have northbound trains dive under southbound trains, which is painfully stupid of the contractor.
I won't even bother talking about the and . At this point, I believe I've made my stance on proposals like the ones in this study clear.