JA horizontal curve on a two-lane highway (12-ft lanes) has PC at station 124 + 00 and PT at station 130 + 00. The central angle is 30 degrees, and 25 ft is cleared (for sight distance) from the inside edge of the innermost lane. a. Determine the radius of this horizontal curve. b. Determine a maximum safe speed for this curve section.

JA horizontal curve on a two-lane highway (12-ft lanes) has PC at station 124 + 00 and PT at station 130 + 00. The central angle is 30 degrees, and 25 ft is cleared (for sight distance) from the inside edge of the innermost lane. a. Determine the radius of this horizontal curve. b. Determine a maximum safe speed for this curve section.

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

Step by step solutionProblem 1. An existing equal-tangent sag vertical curve is designed for 60 mph. The initial grade is -3% and the elevation of the PVT is 750 ft. The PVC of the curve is at station 134+00 and the PVI is at 137+00. An overpass is being constructed directly above the PVI. The overpass design assumes the driver’s eye height is 5 ft. Determine: a. the stopping sight distance b. the curve lengthc. the clearance heightd. the mid-curve offset e. the elevation of the PVIf. the elevation of the bottom of the overpass structureg. Is there a linear relationship between curve length and K-value in this problem? Note: No need to show calculations for case (g).
A symmetrical parabolic curve connects two grades of +6% and -4%. It is to pass through a point "A", the stationing of which is 35+280 and the elevation is 198.13m. If the elevation of the grade intersection is 200m. with stationing 35+300. Determine the length of curve.
A simple horizontal curve has 35 degrees of curvature and subtends an angle of 110 degrees. If the PC is at station 3 + 65.00 ft, what is the length (ft) of roadway to the first full station on the curve? The first full station occurs at 4+00
1. If a vertical curve is introduced between an upgrade of 0.9 in 100 followed by a down grade of 0.7 in 100, determine the length of the parabolic vertical curve, the offsets at every 30m and the R.Ls of the various corresponding points on the curves. When given the R.Ls of the ground at the point of tangents intersection is 30m.
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.
A horizontal curve is being designed for a new two-lane highway (12-ft lanes). The PC is at station 150+50, design speed is 55 mi/h, and a superelevation of 0.08 fuft is to be used. If the central angle of the curve is 40 degrees, design a curve for the highway by computing the minimum radius and stationing of the PI and PT??
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?
A horizontal curve on a four-lane (two lane in each direction) highway (11-ft lanes) has PC at station 124+30 and PT at station 130 + 15. The central angle is 40 degrees, the superelevation is 0.12, and 23.5 ft is cleared (for sight distance) from the inside edge of the innermost lane. Determine a maximum safe speed (assuming current design standards) to the nearest 5 mi/h.
ans No. 3 only. asap
A reverse curve with diverging tangent is to be designed for a proposed highway as illustrated below. The reverse curve is composed of one compound curve, from point A to C, and one simple curve, from point C to D. Point A is located at the Point of Curvature having Station 12+808.35, point B is located at the Point of Compound Curve, point C is located at the Point of Tangency. The back tangent of the reverse curve is having an located at the Point of Reverse Curve, and point D azimuth of 388.5 degrees and the forward tangent is having an azimuth of 748.8 degrees. The common tangent for the reverse curve has an azimuth of 313.1 degrees from south. It has been found out that the long chord of curve A to C is thrice the value of the chord in curve C to D. The common tangent of the curve A to C is having an azimuth of 254.1 degrees from south and the chord of curve C to D is 161.3m long.