9
Design Elements
General Guide to RoadPlus - 4.0.0en
The Horizontal Alignment
Clothoïde
Circle
Tangent Spiral (TS)
Station, Easting, Northing, parameter A
Curve Spiral (CS)
Station, Easting, Northing, parameter A
Spiral Curve (SC)
Station, Easting, Northing, Radius
Spiral Tangent (ST)
Station, Easting, Northing
Beginning of Project (BOP)
Station, Easting, Northing
S
tationing
End of Project (EOP)
Station, Easting, Northing
Tangent
Tangent
Clothoïde
The horizontal alignment defines the road axis of a project.
The
constituting elements
of a horizontal alignment are
•
tangents (straight segments)
•
circles
•
clothoïdes (spiral in/out, curve in/out).
Each constituting element is defined by individual
horizontal
design elements
such as station, easting, northing, radius
and parameter A.