^ Good to see they are further along than I thought. Maybe a SSP photographer can get down there for an update.
All of the initial construction access will have to come through the south from Wentworth and from the north on Wells. The Wells access is not complicated, bridge viaduct is in place.
But the Wentworth phase 3 has more work to do. The CN railway will need to sign off on a new at grade crossing here: And the viaduct under the St Charles Airline will need some attention.
Google Map
And this triangle of rail is in play for the
Cross Rail project which is the lynchpin for connecting Metra/Amtrak and Regional rail projects to and through CUS onto OHare. So eventually Metra, Amtrak, Midwest Regional Rail, CMAP, CTA, CDOT, IDOT, CN Rail maybe BNSF since ST Charles connects to their ROW, FRA all will need to come to the table for optimal planning.