Stage 1, which represented the state of affairs when the tunnel opened in 1984, was hampered by an "imbalance" between the Pennsylvania lines and Reading lines. Both the R3 and R4 would short turn at Wayne Junction or Suburban Station (as would some R7 trains), which cut against the diametrical principle. To correct this, Vuchich proposed the construction of a connection in the Swampoodle neighborhood between the ex-Pennsylvania Chestnut Hill West Line and the ex-Reading trunk line west of Wayne Junction as part of Stage 2, moving the Chestnut Hill West line to the "Reading" side. This connection was never built, leading (among other factors) to the following changes: