Question: A horizontal curve has two lanes per direction. The radius, measured to the center marking that separates the two opposing directions is 7 0 0

A horizontal curve has two lanes per direction. The radius, measured to the center marking that separates the two
opposing directions is 700 ft. The lane width is 14 ft. The wall of a tunnel is 10 ft from the right edge of the right
travel lane. What is the available sight distance, S, on the road segment with the tunnel?

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