The formation width of road in embankment is its roadway.
The total width of a road at the pavement's lowest point is referred to as the width of formation. It is the total width of the pavement or roadway, including any shoulders and separators that may be present. Roadway width refers to a road's overall top width. Occasionally, the roadway width itself is called formation width.
Hence we can say that the formation width of road in embankment is its roadway.
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