How do they decide the way mountain roads twist and turn?

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How do they decide the way mountain roads twist and turn?

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Anonymous 0 Comments

For starters it matters what you begin with. A lot of those roads are made on top of existing paths or trails but even if there’s nothing the morphology of the mountainside dictates the general shape of the road. Also depending on how easy or hard it is to actually make the road dictates whether it might be rerouted from somewhere else. The ground, the slope, rocks, boulders and so on all play a role in how easy or hard it is to make the road. Lastly the gradient of the road is a very important factor which leads to engineers often adding many turns to make the slope more shallow. That’s when you see all those successive switchback hairpins for example.

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