Question

SR 360 is a four-lane highway without median with 12-ft lanes and 70 mph design speed.In one section of the highway,a transition must be made between a horizontal curve with radius 1828.2 ft and a tangent section.

a)What is the minimum required length of the spiral transition curve?

b)How long should the transition runoff length be?Assumed rotated through the center line

c)Which one of the two values will you adopt as your transition curve length? Why?

Answer 1

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