Question

6:47 1 4 Search <Back Hw#3-2019.doc 15- 10. A horizontal curve is designed for a two-lane road in mountainous terrain. The following data are known. Intersection angle: 40 degrees Tangent length: 436.76 feet Station of Pl: 2700+10.65 fs- 0.12 e- 0.08 Determine the following. (a) Design speed (b) Station of the PC (c) Station of the PT (d) Deflection angle and chord length to the first even 100 ft station. 15-11. A proposed highway has two tangents of bearings N 43° 34 36" E and N 1°22" 30 W. The highway design engineer, attempting to obtain the best fit for the simple circular curve to join these tangents, decides that the external ordinate is to be 43.00 ft. The Pl is at station 65+ 43.21 Determine: (a) The central angle of the curve (b) The radius of the curve (c) The length of the tangent of the curve (d) The station of the PC (e) The length of the curve (f) The station of the PT (g) The deflection angle and chord from the PC to the first full station on the curve curve exists with a degree of 15-12. A simple circular curve D 12° ande 0.08 A structure is proposed on land on the inside of curve Assume the road is on level grade. Determine: (a) The radius of the curve (b) The curent maximum safe speed of the curve (Hint: try and error method) (c) The minimum distance allowable between the proposed structure and the centerline of the curve such that the current maximum safe speed of the curve would not need to be reduced 15- 13. A circular curve connects two tangents that intersect at an angle of 48°. The point of intersection of the tangents is located at station (948+67.32). If the design speed of the highway is 60 mi h, determine both the point of the tangent and the point of curvature. 8%, and = 0.12.) Calendar To Do Inbox

Answer 1