Added a few more "openings" on the East side. (Click on pictures to enlarge.)
Made this timber portal out of left over pieces from the trestle.
Steel H-Column reinforced 'hole in the wall' serves as observation point for O-Gauge operator, and as access for the railroad maintenance crew.
Road tunnel leading up to second level. Idea 'borrowed' from Alex Malliae.
Thank you for looking!
Alex