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a highway curve for a rural two-lane road connects front and back tangents at Station 74+30...

a highway curve for a rural two-lane road connects front and back tangents at Station 74+30 at an angle (delta) of 38 degrees 16’ 31”. using the maximum allowable superelevation for the curve,(a) what would be its minimum radius for design for a posted speed of 55mph? (b) What would be the station locations of the PC and PT for this curve? (c) If the inner radius was kept clear of all visual obstructions out to a distance of 45 feet from the road centerline, would it meet the AASHOT SSD criteria at its design speed if constructed at a 2% downgrade?

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