At another point we were told about getting the rail track through the mountains by spirals, a Swiss technique. The trans-Canada line was the price of British Columbia joining the Dominion instead of USA.
We were lucky enough to see a train in all three parts of the S. The pic is not clear but the look for light patches at 3 levels, the lowest and nearest at head level.
Are the roads suitable for those RVs? If there are a lot of bends, I would have thought that there might be "challenges"!
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