ðə kˈɔst tə dˈuː ðɪs sˌɛpɚɹˈeɪʃən ɪz klˈoʊs tə dˈɑːlɚ fˈaɪvhˈʌndɹɪd mˈɪliən, bˌʌt wɪl biː pˈeɪd bˈæk ɪn fˈʊl ɪn ɐ mˈæɾɚɹ ʌv jˈɪɹz æz mˈoːɹ tɹˈeɪnz ɑːɹ ˈædᵻd tʊ ˈɔːl lˈaɪnz.
The cost to do this separation is close to $500 million, but will be paid back in full in a matter of years as more trains are added to all lines.