Signaling, land purchases, earth moving were included with track extensions because an increase per kilometer is only equal to about 1.5-2.5 million dollars per kilometer, depending on circumstances. Costs for additional maintenance facilities and rolling stock are tricky to determine, but say 4 million dollars per EMU, 4 car EMU trains every 15 minutes. Assuming all areas of the go network use this (to account for spare ratios). This should equate to about 60 trains, 240 cars. ~1 billion dollars. We'll say 14 billion to include an extra billion dollar contingency (even though all other aspects were at the very highest of potential costs). Again, where are the other 7.3 billion dollars going? That money could be used for projects like the DRL or Bloor Danforth capacity improvements.