Option

Description

Name

Enter the PI name.

Radius

Enter the horizontal curve radius.

The start chainage of the road must be entered as the radius of the first PI.

TrIn

Enter the length of the transition curve (Euler spiral/ clothoid) leading into the curve.

TrOut

Enter the length of the transition curve (Euler spiral/ clothoid) leading out of the curve.

Y Co-ord

Enter the Horizontal coordinate.

X Co-ord

Enter the Vertical coordinate

Offset

Enter the amount by which the alignment must be offset from the actual centre. This is normally used in cases where the alignment points are not along the centre line of the road but rather at some other point such as the left or right kerb line.

Offsets to the left of the alignment are entered as negative numbers, and those to the right as positive numbers. When the alignment is stored or calculated in any way, these offsets are used to determine the correct position of the points along the centre line.

No

The PI number will be automatically updated.