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(Solved): A highway is being designed to AASHTO guidelines with a 70-miles/hr design speed, and at onesection, ...
A highway is being designed to AASHTO guidelines with a 70-miles/hr design speed, and at one
section, an equal-tangent vertical curve must be designed to connect grades of +1.0% (initial) and -2.0%
(final). Using both the (i) Stopping Sight Distance (S) and (il) Vertical Curvature (K) approaches,
determine the required minimum length of curve.
(a) A highway is being designed to AASHTO guidelines with a 70-miles/hr design speed, and at one section, an equal-tangent vertical curve must be designed to connect grades of (initial) and (final). Using both the (i) Stopping Sight Distance (S) and (ii) Vertical Curvature (K) approaches, determine the required minimum length of curve. [10 marks]