Middlebury, VT has a new rail tunnel under construction fabricated from precast concrete.  This could be a unique scene to model.   Clearances in the new tunnel accomodate new equipment and the town green is improved.

The above picture dated 7/28/20 shows the first top section in place. It's practically a mirror image of the U-shaped pieces lining the trench.  The trench is several feet deeper than the original rail bed running through the town.

The 1920's bridges before demolition.  (photo by Melody Bodette)

This  google maps view shows the downtown area before construction.

I added red lines to the dark trench that is the Vermont Railway track.  Triangle Park (green lettering) will be expanded once the tracks are covered.

https://vtrans.vermont.gov/sites/aot/files/projectsites/middlebury/Middlebury_2019_Storyboard_v4.pdf

Artist's rendition shows the north end of the tunnel with side walls tapering down next to "Printer's Alley".

7/28/20 northern portal, apparantly where sidewalls will taper as seen in the artist's rendition above

the crane lowers this precast section from a flat bed truck to the roadbed

7/15/20 this is how the north end of the tunnel looked as the blast maps were removed from the rock

storage area for tunnel pieces about 1 mile from construction

By fall, railroad tracks will be return to Middlebury station.  Barely visible in the distance are two orange pylons at the end of the line for now.

https://addisonindependent.com/news/builders-set-timetable-intense-rail-tunnel-construction-middlebury