the alignment curve tool to compute
the curve and line tangent points.
To perform horizontal curve alignment, first use the
pointer tool from the toolbar to select design segments by clicking on
the icon. Select a circle and two lines with
which the software will compute the tangent points. The selected elements will
be highlighted as shown in Figure 6.
Figure 6 Select horizontal alignment
Secondly, use the “align curve ” tool under the tool menu or use the alignment iconfrom the toolbar
after 2 lines and 1 circle are selected/highlighted. Tangent points will then be
calculated and selected curve will be translated to conjunct the tangent points
as shown in Figure 7. Select the modify end point tool and use right mouse click on a tangent point to delete tangent pair
point if necessary. Use the “unselect all” option from the edit menu to unselect all elements or click on the selected
item again to unselect the item. And follow the same steps as previously
mentioned to complete the 2nd curve tangent points.
Note: Use right mouse clicking on a
segment (line or curve) to delete. Associated tangent pair will be removed when
removing a curve.
Figure 7 Horizontal curve