Field
Option
Description
Use PVI
instead of
element for
vertical
alignment
definition
Check box
When this box is not checked, elements such
as straights, curves and parabolas define the
vertical alignment.
When this box is checked, the vertical align-
ment is defined by
P
oints of
V
ertical
I
nter-
section. PVIs are tangent or geometrical
points.
•
Vertical alignments with symmetrical
curves are defined by the PVI chainage,
the elevation of PVI and the total length
of curve, where the tangent length is
half the total length of the VC.
•
Vertical Alignments with non-symmetrical
curves are defined by the PVI chainage,
the elevation of the PVI and both tan-
gent lengths.
44.4
Edit Horizontal Alignments Using Elements
44.4.1
Overview
Allows creating, editing and deleting of the following elements:
•
Start Point
•
Straight (Tangent)
•
Curve
•
Clothoid
•
Cubic Parabola
•
Partial Bloss
as well as checking the horizontal alignment.
In
Alignment Editor Menu
highlight
Edit horizontal alignment
. Press
OK
.
☞
Use PI instead of element for horizontal alignment definition
must be unchecked in
Measure Settings
,
Advanced
page.
Description
Access
Horizontal Alignment,
Elements page
Roads - Alignment Editor
711
