rack railway(redirected from Cog railroad)
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See cog railway.
(Railways) a steep mountain railway having a middle rail fitted with a rack that engages a pinion on the locomotive to provide traction. Also called: cog railway
a railroad having locomotives with a cogged center driving wheel engaging with a cogged rail to provide traction for climbing steeper grades.
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|Noun||1.||rack railway - railway for steep mountains; a cogwheel on the locomotive engages cogs on a center rail to provide traction|