A crest vertical curve joining a + 3 percent and – 4 percent grade is to be designed for 75 mph. If the tangent intersect at station (345 + 6000) at an elevation of 250 ft, determine the stations and elevations of the PVC and PVT. aDesignspeed(km/h)2030405060708090100110120130Stoppingsightdistance(m)2035506585Metric105130160185220250285Rate of verticalcurvature, KaCalculated0.61.93.86.411.016.825.738.952.073.695.0123.4Design12NALITESERIEN15 20 25 30 35 40 45 50 55 60 65 70 75 m4711172639527495Designspeed(mph)12480US CustomaryStoppingsightdistance(ft)80115155200250305360425495570645730820910Rate of verticalcurvature, KaCalculated3.06.111.118.529.043.160.183.7113.5150.6192.8246.9311.6383.7Rate of vertical curvature, K, is the length of curve per percent algebraic difference inintersecting grades (A). K = L/ADesign37121929446184114151193247312384Exhibit 3-76. Design Controls for Stopping Sight Distance and for Crest and Sag VerticalCurves

Answered: Image /qna-images/answer/c6fd820f-19aa-4aa2-bed2-8d22a19ba3c1.jpg

A crest vertical curve joining a + 3 percent and – 4 percent grade is to be designed for 75 mph. If the tangent intersect at station (345 + 6000) at an elevation of 250 ft, determine the stations and elevations of the PVC and PVT

A crest vertical curve joining a + 3 percent and – 4 percent grade is to be designed for 75 mph. If the tangent intersect at station (345 + 6000) at an elevation of 250 ft, determine the stations and elevations of the PVC and PVT

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

An equal tangent vertical curve is intended to connect grades of 3% and -3.2%. If this curve is to be a part of a highway designed with a speed limit of 70mph, determine the minimum length (ft) of the vertical curve. Use exact solution (do not use the table)
An equal-tangent curve connects a +1.0% and a -0.5% grade. The PVC is at station 54+24 and the PVI is at station 56+92. Is this curve long enough to provide passing sight distance for a 60-mi/r design speed? Problem 2
A sag vertical curve joins a -6% grade and +5% grades. If the PVI of the grades is at Station 355+50 and at an elevation of 156 ft., determine the station and elevation of the PVC, PVT, and the low point for a design speed of 60 mph. Sketch the curve and label the PVI, PVC, PVT and the low point with their stations and elevations. Note: You should check the stopping sight distance criterion and riding comfort design criteria, using the one that controls. 2.
Two-way two-lane highway with a design speed of 110km/hr has two grades of +2.5% & -1.5% connected with a vertical curve at station 121+20 of elevation 210.5m. Find the station & elevation of the turning point on the curve?
2. If a vertical curve is introduced between a down grade of 0.5 in 100 followed by an upgrade grade of 0.3 in 100, determine the length of the parabolic curve, the offsets at every 30 m and the R.Ls of the various corresponding points on the curve when given the R.ls of the ground at the point of intersection is 30 m.
A vehicle highway curve has an approach grade of -4% and the P.C is at station 11+00. The curve is to be 800 ft. long and the sag point is to be at station 16+00 of elevation 86.0 ft. Compute the grade of the forward tangent and locate the P.I.
An equal-tangent crest vertical curve is 1100 ft long and connects a +2.5% and a -1.5% grade. If the design speed of the roadway is 85 mi/h, determine the length of curve, does this curve have adequate passing sight distance?
Determine the minimum length of a sag vertical curve between a -1.06% grade and + 2.1% for a road with 110 kph design speed. The vertical curve must provide 200 m sight distance
Please correct answer
please be sure answer is correct.
An equal tangent vertical curve is intended to connect grades of 3.5% and -2.9%. If this curve is to be a part of a highway designed with a PSD of 500ft, determine the minimum length (ft) of the vertical curve. Use exact solution (do not use the table).
A crest vertical curve will connect a 1.5% grade to a -3% grade with a design speed of 45 mph. Using the SSD (stopping site distance) criterion, what is the minimum length of the curve?