Q) A crest curve has grades of +gi and -g2. A sag curve has grades of -gi and +g2. Both curves have the same design speed V. Assuming Gavg AASHTO’s typical values for parameters: = 0 and, SSD < L for both curves, and using a) For which one of those two curves, is the Stopping Sight Distance (SSD) larger and why? b) Bonus: For which one of those two curves, is the length L larger and why?

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This question about Transportation Engineering

Assume that a metric curve will be used at a Pl where A = 8° 24' Assume also that the station of the Pl is 6+427.464 and that terrain conditions require a minimum radius of 900 m. Calculate the PC and PT stationing, and other defining elements of the curve. Also compute notes for staking the curve using 20-m increments.

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A compound curve has the following properties: 1=24 degrees, 12=36 degrees, D1=6 degrees, D2=D4 degrees, and STA. P.C.=10+420. Degree of curvature uses arc basis. (a) Compute the stationing at P.C.C. and (b) Solve for the station of the point of intersection of the compound curve. Your answer

The reduced level at the intersection of a rising gradient of 2% and a falling gradient of -3%on a proposed road is 89.05m. Given that K value is 55. The throught chainage of theintersection point is 4330m and proposed vertical curve is to have equal tangent, calculate:a) The throught chainage of the points of the vertical curve if the minimum requiredlength is to be used (LV) and the vertical curve setting out data at 20 metres exactinterval.b) The chainage and reduced level of the highest point on the curve.c) Through chainage at highest point was located exactly under a bridge, if the RL of soffit is 92.90m, calculate the headroom based on proposed vertical curve design.

Q4. A falling gradient of P % meets a rising gradient of Q % at a reduced level of LLL.LLL m and a through chainage of QQQQ m. A parabolic vertical curve having equal tangent lengths is to be used to connect the gradients and the K Value for the curve is KK. As a civil engineer you are request to prepare the setting out data based on the vertical curve design parameters given. a) Calculate the reduced levels and chainage of the tangent points, setting-out data at exact 20 m interval, the through chainage and reduced level of the lowest point on the proposed vertical curve. b) If a vertical curve is to be constructed to join two gradients +p % and -q % with the the height of driver view and sight distance for a driver whose height is H.HH m above the road surface is XXX m, respectively. Discuss how to solve this issues in determining the design length of the vertical curve required (parameters for +p %, -q %, H.HH & XXX m not provided. Just discuss the method of solution in determining…

Please solve and answer with complete detailed solution. Please also include the figure. Correct answer is appreciated. Thank you.

In a railroad layout, the centerline of two parallel tracks are connected with a reversed curve for unequal radii. The central angle of the first curve is 19°, the distance between parallel tracks is 29.55 m, radius of the second curve is 320 m, and the stationing of PC is 15+240 Determine the following: ma) Length of the long chord from PC to PT m b) radius of the first curve c) stationing of PT