Quite a bit of work on the UP Westline. Here is an article about it
Metra train station project chugs along in Elmhurst
By Annemarie Mannion, TribLocal reporter
Improvements to the Union Pacific West rail line and to the Metra station in Elmhurst are slated for completion sometime this fall.
The project, which is also being done at 11 others on the line, is intended to improve operations.
"It's a project to make the line run more smoothly and efficiently," said Michael Gillis, a Metra spokesman. "There are old signaling systems that need improvement."
The work includes adding crossovers, which allow incoming trains to switch tracks if a train is already on the track.
"It increases the flexibility when you're running a train," Gillis said.
The work includes adding sidewalks to better channel where pedestrians walk.
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I've observed much of this work taking the train everyday. Other work that I've seen includes a pedestrian underpass in Winfield, some new track between Elmhurst and Berkley, in addition to adding and replacing (work still in progress) some small bridges to support 3-tracks (the UP-West Line goes down to two track between River Forest and Elmhurst). It's beautiful to see something get done. For those curious, here are the details of this work:
http://metraconnects.metrarail.com/upw.php.