I am identifying "motorway islands," which are stretches of motorway that do not connect to trunk networks. Does the whole road between Hwy 216 and Hwy 14 have the importance of highway=trunk?

If not, tag the freeway here as expressway=yes; highway=primary for regional importance.

Has Artists Monument moved again? Or has it been removed permanently?

Are the natural features signed or named here ("Mesic Prairie", "Emergent Marsh")? These seem to be the types of grassland/wetland of the ways.

New Lenox station has a Metra ticket machine.
https://metra.com/train-lines/RI#NEWLENOX

80th Avenue station has a Metra ticket machine.
https://metra.com/train-lines/RI#TINLEY80TH

Tinley Park station has a Metra ticket machine.
https://metra.com/train-lines/RI#TINLEYPARK

Oak Forest station has a Metra ticket machine.
https://metra.com/train-lines/RI#OAKFOREST

"Permanently closed"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2025-12-14T02:16:23Z
POI name: Forbidden Noodles
POI types: amenity-restaurant
#organicmaps android 2025.12.16-16-FDroid

"55 mph north"
OSM snapshot date: 2026-01-11T01:09:17Z
POI name: Kingery Highway
POI types: hwtag-oneway highway-motorway
#organicmaps android 2026.01.16-8-FDroid