Road Edge Rounding

This function designs road edge lines (road edge curves at intersections, road turns, etc.) with multiple arcs (1 arc, 2 arcs or 3 arcs) of the desired radius and draws it in your drawing.

• This function can be used in many contexts and for everything that resembles an intersection edge line (not necessarily in association with a road edge).

• This function can construct a tangential connection between any two line/arc elements, which consists of one, two, or three arcs.

• In addition, straight lines (tangent lines) can also be inserted before and after the arcs.

• The only requirement is that the angle between the lines is less than 200 grads.

• The result of the Road Edge Rounding will be a 2D drawing.

Run the function from the following locations:

MOUS_ICO Toolbar: Intersection Tools: Road Edge Rounding

MOUS_ICO Menu: Road > Intersection Tools > Road Edge Rounding

Select type of edge line

The function constructs edge lines with one, two, or three arcs. Mark the desired radio button.

Draw Setup

Use this button to configure the drawing setup of different lines of intersection. The dialog Interchange - Drawing Setup will pop up.

• The setup number 2 is meant for the road edge rounding line.

3-Circle arc proportions

The proportion between the three radii is defined in these cells. Enter the proportionate values at the fields R1 and R3. This option is not available for the Edge Line types 1 arc and 2 arcs.

The details of the dialog Edge Line Rounding will depend on the type of edge line selected (1 arc, 2 arcs, or 3 arcs).

Edge Line Rounding

• Depending upon the type of edge line selected (1 arc, 2 arcs, or 3 arcs) in the dialog Edge Line Rounding, this dialog will have related parameters to define.

The options Create, Edit, Reference Point <, Tangent Point <, Drag <, etc., are common to all three types of edge line.

• The dialog can also be activated from the option Edit of the Object menu (NCO) on the road edge rounding object.

• Existing road edge rounding objects can be edited.

Create <

Use this button to select the two intersecting road edges to design the road edge line.

Command prompts for:

Pick start edge line (turning right):

Select the start edge line for a right turn.

Pick end edge line (turning right):

Select the other road edge.

A preview of the edge line will be drawn in CAD with the default values.

• The preview will be updated automatically, then parameters are updated.

• The construction probably has tangential straight lines before and after the arc(s).

• This is shown by the Delta start di and Delta end du parameters not being 0 (the lengths of the tangent lines).

• Positive values mean that a straight line (tangent line) is inserted.

• Negative values should never be accepted, as this will give error messages for the exit position.

Data table

• The parameters in grey cells cannot be edited, as these values are read/calculated by the program.

• The units of linear measurement and angular measurement are meters and decimal degrees, respectively.

• Vehicle - Select the design vehicle for designing the edge line from the pull-down menu.

• Radius 2 - Define the radius for the middle arc. The radius for the other two arcs is calculated depending on values defined in Road Edge Rounding.

  • The radius can also be defined using the button Drag <.

• In the case of 1 Arc edge line selection, only the design vehicle is designed.

• In the case of 2 Arcs edge line selection, both the radius (Radius 1 and Radius 2) and design vehicle are defined.

Ref. Point <

Use this button to pick a reference point from the drawing.

Command prompts for:

Select a reference point:

Pick the reference point from the drawing. Use Object snap modes for precise selection.

Drag <

Use this button to change the radius dynamically. The radius on the road edge is changed with the movement of the mouse.

Tangency Points <

Press this button to move the tangents to the road edge lines dynamically. An option here is to insert the required straight lines before and after the arc(s).

Calculate points of tangency

Mark the check box Calculate points of tangency so that the road edge rounding element is tangential to the road edge lines.

Object menu (NCO)

To edit the road edge rounding, activate the function Novapoint - Object menu (NCO), and select the road edge rounding object to be edited.

• Edit - Use this option to edit road edge rounding objects by editing the parameters.

• Delete - Erases the selected object.

• Make - Creates new road edge rounding without changing the selected object.

• Update - If the baselines are modified/moved, use this option to update the road edge rounding.

• Drawing layout - Same as that of the option Draw Setup above.

Next topic: Road Edge: 2R