Auto Road Creation

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Introduction

This command enables the user to create multiple Road Strings at once.

For Civil 3D users, the software scans for all alignments in the drawing and presents a form for the user to select which alignments from the drawing should be created as Roads.  Any alignments with r- in the description field will initally be set to become a Road string.

For non-Civil 3D users, the software selects all alignments of type 'Road'.

For each of these alignments the software:

• Creates a Road String including
  • Assigning a Template to each Road, reading the required data from the Set Road Defaults form (or Active Drawing Settings where the Set Road Defaults form is incomplete)
  • Automatically generating an Existing surface profile and Design surface profile in the Vertical Grading Editor

Note: For this routine to work, the software looks into the Active Drawing Settings and Set Road Defaults to confirm:

• That the default surface exists in the drawing
• That the selected template/s exist

If there is missing information, the user will be advised of the missing data and provided the opportunity to update the missing data before processing the Roads.

The Design profile, by default, includes a Least Squares algorithm to analyse the shape of the natural surface and design IP's to generally match the natural surface elevations, including assignment of vertical curves.  Civil Site Design includes tools to dynamically update the alignment and automatically connect up at intersections - see Vertical Grading Editor for more details.

At the end of the road creation process the software will start the Intersection Manager command.

Important associated commands:

• Active Drawing Settings - Base settings used by Civil Site Design to automate the design
•  Open Vertical Grading - Editor to adjust profiles and cross sections for the road elements

Details

Use this command to automatically create roads from alignments that have the prefix 'r-' in the description field.

Upon selecting the command the following form is displayed:

This form enables the creation of a Road in Civil Site Design. Roads interact with each other, with Side Road profiles adjusting to match the cross section of the Main Roads at the intersections and the side road cross sections trimming to form up correct Surface and Corridor models. The form enables the Designer to: Assign a typical cross section for the Road (through the assignment of a Template) Assign the 'natural' surface elevations for the Road Choose the sampling frequency along the Road All command settings as as per the Create/Edit Roads command.

In Civil 3D, after clicking OK the following form is displayed:

Alignment List	Lists each String in the drawing and allows the user to select which alignments will be used to create Road Strings or Profile Strings.  Options include
Alignment Name	Non editable field documenting all alignments not currently used as Strings in the drawing
Create As	Pick box to select what to create: Road - creates a Road String from the alignment. A Template and other settings as assigned from the   Set Road Defaults command. Profile - creates a Profile String from the alignment.  No Template is assigned upon creation Skip - does not create a String from the alignment
Group Selection	Allows for highlighted alignments to be changed at once.  Options:
Road	Sets all highlighted alignments/strings to become Road strings
Profile	Sets all highlighted alignments/strings to become Profile strings
Ignore	Sets all highlighted alignments/strings to not become Strings
Viewing Options	Allows for zooming to particular alignments in the drawing
Auto Zoom	When ticked, selecting an alignment/string in the list will force the drawing to zoom to the alignment.  Does not support group selection - the first highlighted will be used.
Zoom Extents	Zooms to the extents of the selected alignment/string in the list and highlights in the drawing.  Does not support group selections - the first highlighted will be used
Highlight	Highlights the selected alignment/string in the list.  Does not support group selections - the first highlighted will be used
OK	Apply and exit.
Cancel	Exit the form without deleting any data.
Pan in Drawing	Allows panning in the drawing.  Press [Esc] or click in the drawong to return to the form.

After clicking OK, the software will create Road Strings from all selected 'Road' alignments in the drawing that are not already Road strings.

After the roads are created, linework will display to describe the cross section design of each Road string.

Use the Create/Edit Roads command to adjust the cross sections and/or profile design for any particular Road.