Proviso Yard to West Chicago

The passenger tracks and the freight tracks come back together, with an intermodal yard between them and dual highway bridges overhead, at the west end of the Proviso Yard facilities (including a freight bypass north around the northwest side of Chicago connecting all former C&NW lines) at the crossovers at HM (MP 15.2), which have pole signals with multiple multi-lens heads at the east end, and a signal bridge at the west end.  There are various speed restrictions for diverging trains at HM, but straight trains travel at full speeds: 70 mph for passenger, 60 mph for TOFC, and 60 mph for freight trains. There are three lefthand running tracks west of HM: track 1 (the most southerly ) is ABS, current of traffic, track 2 is CTC-controlled, and track 3 (the most northerly) is also ABS, current of traffic, past a grade crossing, a street alongside to the north, a grade crossing, and a bridge over a road.

There is a grade crossing at the east end of the Metra station, with two side platforms and a brick depot on the north side, at Elmhurst (MP 15.7), a grade crossing at an acute angle at the west end of the station, a grade crossing (under reconstruction, in November 2006), and a grade crossing, the track angles just south of due west, past a signal bridge, anda bridge over a divided street (which has another through girder bridge over it, just to the south, presumably carrying the CN(IC)), and passes beneath a through girder bridge carrying  the CN (IC) line to the west. There is a grade crossing, a Metra station, with two side platforms and a brick depot on the north side, at Villa Park (MP 17.8), a grade crossing at the west end of the station, MP 18, a grade crossing, MP 19, the line edges west-southwest, the former Chicago Great Western once passed overhead (and the bridge abutments remain), there is a grade crossing, a street alongside to the north, a bridge over a street, Lilacia Park on the south side, crossovers at MP 19.5, a Metra station, with two side platforms and a pedestrian crossing, at Lombard (MP 19.9), two grade crossings, a bridge over a road, a bridge over an Interstate-style highway, MP 20, a bridge over a street, a grade crossing at the east end of the Metra station, with two side platforms and a brick depot on the north side, at Glen Ellyn (MP 22.4), where the former Chicago, Aurora and Elgin interurban once ran alongside to the south (the route is now a bike path, with bridges still in place), and a grade crossing at the west end of the station.

From MP 22.3 to 25.4, the speed limits are 55, 55, 50 before resuming full speeds. The line turns west, past a grade crossing and a street alongside to the north, southwest past a grade crossing at the east end of  the Metra station, with two side platforms and a brick depot on the north side, at College Avenue (MP 23.8), and a grade crossing at the west end, and then just south of due west past a grade crossing, a grade crossing at Washington, a grade crossing at Cross Street, two grade crossing, a grade crossing at Wheeler Street, crossovers at MP 24.5, and the Metra station at Wheaton (MP 25.0), with two side platforms, a grade crossing cutting the platforms, and a brick depot on the north side, where it turns northwest and the CA&E once bridged overhead on a through truss bridge still in use as a bike path, followed by a road bridge overhead.

The three-track line turns west, in a wooded area, past a pedestrian bridge overhead, the DuPage County administrative facilities on the south side, and a bridge over a road, and then west-northwest past the Metra station with two side platforms and a brick depot on the north side at Winfield (MP 27.5), a grade crossing within the station, and a grade crossing at the west end, just north of due west past a deck bridge over a river, a street alongside to the north, a signal bridge and detectors at MP 29.0, a grade crossing and a road alongside to the south, west-northwest past the signal bridges and crossovers at NI (MP 29.5), with a road bridge overhead between the crossovers and a spur on the south side to the rail-served industry Jel Sert, on that side, where speed limits are 55, 55, 40 for straight trains (to MP 30.0) and 30 mph for diverging trains, the spur on the south side trailing in at the west end of the facility, and the Metra station, with center island and north side platforms, and brick depot on the north side, at West Chicago (MP 29.8), with a  road bridge overhead west of the station.

There are signal bridges and crossovers, with extra track on the south side, at JB (MP 30.3), where a former Burlington line heads southwest, there was once an east-to-north connector to the ex-C&NW branch to Rockford, heading north at this point, a grade crossing, and the Elgin, Joliet & Eastern (EJ&E) crosses at grade as the main line turns due west, and a west-to-north connector to that ex-C&NW branch trails in on the north side, with a spur curving away to the north, at the east end of the eight track West Chicago Yard on the north side of the line (and a tow-track auto yard on the south side), where speed limits are 45, 45, 35 for straight trains (to MP 30.5) and 10 mph for diverging trains. West of NI, all three tracks are CTC-controlled.