Use the command Convert Polyline to Tangent Polygon to convert any polyline to a tangent polygon. On the basis of a tangent polygon defined, the main elements are drawn and labeled.
Click on Convert Polyline to TP icon.
Select a polyline to be converted.
In Create Tangent Polygon click OK.
In Draw lanes and widenings select vehicle combination to calculate widenings.
The program converts a polyline to a tangent polygon.