wo straight tangents of a two-line highway intersect at point B. The tangents have azmuths of 270 degree and 110 degree respectively. They are to be joined by a circular curve that has a radius of 7300ft. a) What are the tangent lengths? b) What is the length of curve? c) What is PI station if PC is Sta. 62+75'? d) What is the central angle for 500ft arc? e) If the curve is laid out by the tangent-offset method

wo straight tangents of a two-line highway intersect at point B. The tangents have azmuths of 270 degree and 110 degree respectively. They are to be joined by a circular curve that has a radius of 7300ft. a) What are the tangent lengths? b) What is the length of curve? c) What is PI station if PC is Sta. 62+75'? d) What is the central angle for 500ft arc? e) If the curve is laid out by the tangent-offset method

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter15: Geometric Design Of Highway Facilities

Section: Chapter Questions

Problem 16P

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2. A compound curve connects three tangents having azimuths of 254°, 270°, & 310°, respectively. The length of the long chord is 300 m. long measured from the PC to the PT of the curve and is parallel to the common tangent having an azimuth of 2700 if the stationingof the PI is 6 + 520. Determine:a. Central angle of the first and second curve: I1 and I2b. Length of the Chords; L1 and L2c. Radius of the first and second curve; R1 and R2d. Length of the first and second curve; Lc1 & Lc2e. Stationing of PCf. Stationing of PCCg. Stationing of PT
The common tangent of a reversed curve is 280.5m, and has an azimuth of 312°29’. BC is a tangent of the first curve whose azimuth is 252°45’. DE is a tangent of the second curve whose azimuth is 218°13’. The radius of the first curve is 180m, PI is at sta 16+523. B is at PC and is at the PI. What is the stationing of V2?
Two tangents intersect at station 2+530. A compound curve laid on their tangents has the following data: I1 = 31°, I2 = 36°, D1 = 5°, and D2 = 2° find : a) The length (in meters) of R2 is b) The straight distance (in meters) between Sta PC and Sta PCC c) The curve distance (in meters) between Sta PCC and Sta PT d) The length (in meters) of common tangent is e) The tangent distance of between Sta PI and Sta PC of the compound curve f) The stationing of P.C. is
Situation 1] A circular road is proposed to be laid out with tangent AB whose bearing is N85º54’E intersecting another tangent line BC whose bearing is N48º30’E. If the degree of the curve is 4.5º, using arc basis, determine the following: Tangent distance of the curve, T Long chord of the curve, C Middle ordinate, M External distance, E Length of the road, LC If the station of point B 10+584, determine the station of PT.
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3. Two tangents intersecting at station 8 + 95.21 have azimuth of 260° and 284° respectively, and are to be connected with a 5° simple curve. If the new P.T. is to be shifted 5 m. directly opposite of the old P.T. without changing the directions of the tangents. Compute the new tangent distance.
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