That looks real estate intensive. Compare to a rack railway.
https://en.wikipedia.org/wiki/Rack_railway
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The Locher rack system, invented by Eduard Locher, has gear teeth cut in the sides rather than the top of the rail, engaged by two cog wheels on the locomotive. This system allows use on steeper grades than the other systems, whose teeth could jump out of the rack. ... Locher set out to design a rack system that could be used on gradients as steep as 1 in 2 (50%).
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