Detailed Pavement

The dialog can be started from the following locations:

MOUS_ICO Novapoint Roadtask > Design > Model > Detailed Pavement

MOUS_ICO Cross-section Viewer > Right-click on pavement surfaces

MOUS_ICO Road Modeler > Data > Detailed Pavement

The dialog box Detailed Pavement will pop up.

The left pane folders and the surfaces are having shortcut menus.

Use this function for a detailed description of the road pavement layers.


The shape of the roadbed is designed by defining the roadbed surfaces in cross-sections.

Figure 1: Example


Roadbed surface description (roadbed width and slope) is referred to the stationing/chainage and between two successive stations/chainages, linear interpolation will be carried. Using chainages, section basis roadbed surface description is possible.

Shortcut Menu

Roadbed surface - Width

Roadbed width can be defined in three methods

Once a value is defined for the width, the cell of the row corresponding to other methods will turn gray.

Fixed width

To surface edge


Exiting objects (alignment stored in the digital terrain model) can also be used to define the width of the roadbed surface. The roadbed surface will be projected to the vertical plane of the selected object.

Use the button New Alignment to open the dialog Alignments as Surface Edges where the details such as section limits (start and end chainages), method, and the object to be used as the surface edge can be defined. Two sub methods are available for using the details of the object to define the width of the roadbed surface:

Define the start and end chainages, choose a method from the pull-down menu at Method, and select the object from the list. The section limits object selected, and the method adopted will be displayed in the columns Chainage, Alignment, and Alignment method of the dialog Road bed.

Note: Using alignments is not applicable for End surface or in DeepBlasting.

Beam Slope

Using beam slope the designer can add additional width to the roadbed surface based on a beam to assure load carrying capacity (load dispersion) in the road pavement.


Using widening, the designer can add extra width to the roadbed surface.

Beam slope and widening can be used independently of each other.

Road bed slope

Roadbed slope can be defined with one of four (4) methods:

1 - Slope as a decimal value

2 - Slope as a road surface

3 - Slope to pavement bottom

4 - Slope as pavement bottom


Figure 2: Section Basis Road Bed Description

End Surface

Using the end surface, the designer will have full control over where the roadbed ends. The roadbed can even end outside the road surfaces.

The end surface of the roadbed can be described with one of four methods:

1 - Calculate end point

2 - Calculate slope

3 - Calculate start point

4 - Slope from next surface and end point

Some of the end surface methods will override the endpoint of the previous roadbed surface in the description.


Surface 1 (Left Side)

Figure 3: Surface 1 (left side)

Figure 4: Surface 1 (left side)

Surface 2 (Left Side)

Figure 5: Surface 2 (left side)

Figure 6: Surface 2 (left side)

Surface 3 (Left Side)

Figure 7: Surface 3 (left side)

Figure 8: Surface 3 (left side)

End Surface (Left Side)

Figure 9: End surface (left side)

Figure 10: End surface (left side)

Relations (road bed - pavement)

Relations between the roadbed and the road pavement

The lowest layer in the road pavement is laid parallel to the roadbed description. If reinforcement layer 2 is inserted, the lower edge of the next lowest layer will also be parallel to the roadbed. The overlying layers will be laid out parallel to the road surface.

If the roadbed description is given a plane that theoretically comes higher than an ordinary road pavement, it will be inclined in level to the lower edge of the lowest road pavement layer, where this is possible.

Figure 11: Relations between the roadbed and the road pavement

If Rehabilitation of existing road in use: Roadbed description will not be carried out on parts of the profile, which are assimilated to existing road rehabilitation unless a variant of surface slope method 3 is used to follow the bottom of the road bed.

Termination of Road bed

Termination of the roadbed against bottom drain and bottom fill

The roadbed will normally be terminated where the roadbed surface cuts through standard drainage ditch or fill surfaces.

Figure 12: Termination of the roadbed against bottom drain and bottom fill

Always use ditch surfaces! If several ditch surfaces have been used in the surface description of the road top surface, the roadbed will be terminated, as mentioned, against the outer edge of the outermost ditch surface with a negative gradient. Therefore, always enter ditch surfaces in the profile, even if only with a width of a millimeter.

At narrow road bed description: If the roadbed description is narrower than the roadbed, vertical termination surfaces will be laid out up to the lowest road pavement layer as illustrated below.

Figure 13: Vertical termination when the roadbed description is narrower than the roadbed

Next topic: Deep Blasting