Bearing AIBearing IBChainage IDDD°Al'Al"DDD°IB'IB"СНCH153101017310101150(a) Briefly explain the main reason the used of transition curves, how the transitioncurve is used in road geometry design and the purpose of super-elevation incombine road curve design.(b) Two straights, Al and IB, whose bearings are DDD° Al A" and DDD° IB' IB"respectively intersect at point I, are to be connected by a combined curve. Thechainage of point / is CCCC m, while the design speed and radius have been fixedat 90 km/h and 550 m respectively. Adopting a rate of change of acceleration of0.3 m/s. As a civil engineer have been assign to do a trial analysis of the proposeddesign of horizontal combine curve (T1, T2, T3 and T4) and prepared road curvesetting-out data (T1 to T2, T2 to T3, T3 to T4) at 20 m intervals using deflection angleand chord distance method.(c) By adopting the coordinate of intersection point I as (YYYY N, XXXX E). Calculatethe coordinate of tangent point for T1, T2, T3 and T4.

a) Introduction : The following are the primary roles of transition curves (or easement curves): To…

Answered: (a) Briefly explain the main reason the…

(a) Briefly explain the main reason the used of transition curves, how the transition curve is used in road geometry design and the purpose of super-elevation in combine road curve design.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Curve setting

A curve is a turn that is provided horizontally or vertically in the design of highways, railways, and runways. A curve connects two straight lines that are separated by the deflection angle. It helps to change the direction and alignment of the highways, railway tracks, and runways. Therefore, the gradual change in their alignment is made by using a curve to provide comfort to the passengers and this also provides an easy turn to change the direction of the moving vehicle.

Question

Bearing AI
Bearing IB
Chainage I
DDD°
Al'
Al"
DDD°
IB'
IB"
СНCH
153
10
10
173
10
10
1150
(a) Briefly explain the main reason the used of transition curves, how the transition
curve is used in road geometry design and the purpose of super-elevation in
combine road curve design.
(b) Two straights, Al and IB, whose bearings are DDD° Al A" and DDD° IB' IB"
respectively intersect at point I, are to be connected by a combined curve. The
chainage of point / is CCCC m, while the design speed and radius have been fixed
at 90 km/h and 550 m respectively. Adopting a rate of change of acceleration of
0.3 m/s. As a civil engineer have been assign to do a trial analysis of the proposed
design of horizontal combine curve (T1, T2, T3 and T4) and prepared road curve
setting-out data (T1 to T2, T2 to T3, T3 to T4) at 20 m intervals using deflection angle
and chord distance method.
(c) By adopting the coordinate of intersection point I as (YYYY N, XXXX E). Calculate
the coordinate of tangent point for T1, T2, T3 and T4.

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