Now, this is something I always dreamed about, for when I get older and affluent and perhaps a little more self-indulgent.
I spent my childhood alongside the Platte River of Nebraska (I lived in the Sandhills during my adolescence), alongside which follows the most important paved highway in America, the New York City-San Francisco Highway 30, the most important interstate highway in America, the New York City-San Francisco Interstate 80, and before that, the most important railway line in America, the Omaha-Ogden (Utah) Union Pacific Railway.
This was before my time, but the most famous passenger trains in American commerce and history passed through my childhood town; in the steam era, of course the Chicago-San Francisco
Overland Limited, but during the diesel age, the world-renown
City of Los Angeles,
City of San Francisco,
City of Portland, and
City of Denver, 14-18 long yellow passenger-cars on each train.
It's not anything I'm going to do tomorrow, but sooner or later, I'd like to acquire an HO-sized replica of those famous Union Pacific streamliners.
When I was an infant and toddler, the older brothers had an O-scale electric train set-up on three 4'x8' sheets of 1" plywood put together. It was in the dining room of the house; it didn't present any problems, because the house had a barn-sized kitchen too, where one could casually or formally dine anyway.
I'd like to have such a set-up, with all these Union Pacific passenger trains, on four 4'x8' sheets of 1" plywood, but it's my understanding the curvature on HO-scale is much wider than the curvature on the old O-scale.