Routes through the mountains

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Q1: If you want to travel quickly though a mountain area, how would you do it?

[Answer]

If you want to live in mountainous regions, you have to protect yourself from the harsh winter weather. But you also need to be able to get to shops or to work.

Getting between valleys or across mountains is difficult because of the steep valleyside slopes. As a result, most people live on roads that run along valley floors.