The alignment vertices (HPIs) can be positioned in multiple ways. On-line from AutoCAD via MS ActiveX automation technology, visually by using the mouse or by typing the coordinates by hand on a table. After the polyline definition the user can insert circular arcs with or without transition curves in order to formulate the road centerline. The program has a number of functions and operations through which the designer is able to manipulate with detail the road axis elements.

Additionally, when the user inserts the background drawing the program organize within the same layers all the contained elements by this drawing.

The stations along the centerline can be inserted automatically or manually. Then, the user may add or delete a single or a series of stations using both keyboard or mouse. Stations can be placed at specifically positions (starting and ending points for transition curves and tangents) and at the intersections of centerline with TIN lines. Multiple stations insertion at the intersections of centerline and background lines of a certain layer, is also available. Stations can also be projected from another road axis. Finally if the designer changes the horizontal alignment geometry, the program is able to recalculate the stations automatically in real time.

When the current project is a channel, the program calculate the areas that water covers over the two selected time periods. If it concerns existing channel design the definition of single layer as water-cover bound can help the designer to inverse define the desirable form for this channel. This can be done according the existing  polyline bound that lies at the above layer.