Since the ROW west of CFR is wetlands, there are several more drainage ponds that will be trenched to supply fill as the ROW turns NW back to the original US20.
More likely the wetlands will end up blocking any westward extension.
They own the land, but the environmental reviews are 20+ years old and would have to be redone. Also, not known by many is the median of the original EOE between Lake and IL-53 was a special width to accommodate a future rail transit to serve O'Hare from the west. The tollway is eliminating that now.
Also some EOE trivia is the fact that the Gary Avenue exit was added so late to the plan at the behest of DuPage County Govt leaders, the EOE highway lighting was obstructed by the overpass for the ramp. No one moved it in the plan and just installed it as drawn. It has since been removed by the tollway.
Some other trivial trivia, IDOT contractors ran into delays with the EOE overpass of the then Milwaukee Road railroad due to a large unforeseen peat bog. The bog ran so deep they had to make special accommodations for the pylon footings. It was just one of the many delays the EOE had when it was built.
The EOE and the I-255 East St Louis Bypass were the first to use the new design scheme by IDOT using the dark brown painted bridge beams, dark brown square steel signage frames and the fluted concrete supports. This broke away from the long used round aluminum signage frames and green painted bridge beams. This design scheme was also used on parts of I-39.