Some routes leading up the mountain have even become famous across the world due to their twisting and many twists. So, why don’t they create these roads in a straight line rather than zigzag?

The solution is simple: it protects pedestrians’ lives by making it easier for them to walk up hills. In the past, while building a road to the top of a mountain, people would typically bring a donkey and let it climb the slope to investigate first.

They discovered that this animal did not choose the shortest straight path, but rather a path with a slight incline. Because this is the slope where they feel comfortable (approximately 8 to 10 degrees). The exploration team will create based on the animal’s route, after measuring and sketching it.

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