Dave & Jay, Thanks for the suggestions. Yes I was contemplating the "mirror" at the back end of the tunnel with some lights every 5 inches or so in the ceiling. I had not really thought about vehicles with headlights, but that's a pretty cool idea as well. At least I got back down there late last night and started cutting in the final road sections. Hope to send the road paving crew home today, as well as install the lighting and windows & doors in the building.
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