- Question 5 Vertical Crest Curves 15 Points You Are Designing A Highway To Aashto Guidelines Height Of Eye 3 5 Ft 1 (123.07 KiB) Viewed 32 times
X4=2
Question #5 - Vertical Crest Curves (15 Points) You are designing a highway to AASHTO Guidelines (Height of eye = 3.5 ft and the height of object = 2.0 ft) on rolling terrain where the design speed will be 65 mph. At one section, a +(X4/2)% grade and a -(X3/2) % grade must be connected with an equal tangent vertical curve. Determine the minimum length of the curve that can be designed while meeting SSD requirements. (Hint: 1 mile = 5280 ft). (if X4 OR X3 EQUALS O USE 1)