Forging new generations of engineers. Road Design. A Process for Road Layout. Road Design. Check the existing Topographical data. Road Design. Decide on the type of road and characteristics Freeway Arterial Collector Feeder. Road Design.
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A Process for Road Layout
Setting up a chart for survey data and control points
Setting up the 90° Intersection
Now Calculate the Unknowns about the curve.
To find the distance from P.C. to P.T. use the formula
Convert 33°34’ to degrees
Back to the Formula
Finding the angle of the 100’ chord (D)
Bisect the angle to create a Right Triangle
Continue laying out the road and points
To create the vertical profile of the road, lines are dropped from the station points and an exaggerated vertical scale is created. Elevation data from existing station points are plotted to a graph.
A line is plotted through the points. The line is then smoothed and parabolic transitions are added between slopes.
Vertical information is transferred back to the control points.