NCDOT Roadway Design Unit:

The Corridor Modeling dialog was created so that Geopak users could set up project specific preferences for Roadway Designer. With this dialog, the user will set up the following items:

Information set up in the Corridor Modeling dialog should be saved into a Roadway Designer Preference File (or RDP file).

The Corridor Modeling Preference Section is separated into five categories (shown with a basic description of each):

Preferences:		Set path for Project Template Library and DTM folder.
DTM:		Converts and imports Geopak TIN file into Corridor Modeling formated DTM.
Geometry:		Imports Geopak geometry (Chain & Profile) from GPK file.
Plan Graphics:		Imports Geopak Plan Graphics into Corridor Modeling
ALG Viewer:		Allows visualization and deletion of alignments in the ALG file.

2. Corridor Modeling Toolbar

Once all of the preferences have been set under "Corridor Modeling Preference Section", the user can start using the tools under the "Corridor Modeling Toolbar". Please note how the tools have been pre-arranged to follow the workflow for the Corridor Modeling process.

Open Create Template :		Dialog used to create, manage and preview Roadway Templates.
Roadway Designer :		Dialog used to create Corridor, add Template Drops, apply Superelevation and create
		Surface (3D Model).
Drive Roadway :		Allows you to view the path a driver would take along the roadway.
Draw Cross Sections :		Dialog used to draw both the existing ground surface and proposed cross sections.
Cross Section Labeling:		Used to label Cross Sections

Corridor Modeling Dialog - Preferences:

Station Lock:		Allows user to choose between Increment and Even.
		Increment: Station increment is based on first station.
		Example: 10+17.49 (stationing every 50') increment would be 10+67.49, 11+17.49, etc.
		Even: Applies "Even" station increment regardless of beginning station.
		Example: 10+17.49 (stationing every 50') increment would be 10+50.00, 11+00.00, etc.

Slope Readout:		Allows user to choose between different slope formats. Note: All slopes are in "Rise:Run"
		format except for last one (2.0:1).

		Format	Represents Slope As...
		0.50	A decimal value.
		50%	A percentage value.
		0.5:1	A decimal ratio in which the second value is always 1.
		0.5':1'	A decimal ratio in which the second value is always 1, in units of feet.
		6":1'	A ratio of inches against a value of 1 foot.
		12/2":1'	A ratio of inches against a value of 1 foot, in which inches are
			expressed as a fraction whose numerator is 12.
		24/4":1'	A ratio of inches against a value of 1 foot, in which inches are
			expressed as a fraction whose numerator is 24.
		48/8":1'	A ratio of inches against a value of 1 foot, in which inches are
			expressed as a fraction whose numerator is 48.
		96/16":1'	A ratio of inches against a value of 1 foot, in which inches are
			expressed as a fraction whose numerator is 96.
		1:2.0	A decimal ratio in which the first value is always 1.
		500%o	A per mille value (per 1000) rather than a per cent value.
		2.0:1	A decimal ratio given in run:rise format and in which the second value
			is always 1.

Horizontal Chord Length:		Adds additional cross sections through a Horizontal curve to generate a more accurate
		model.
Vertical Chord Length:		Adds additional cross sections through a Vertical curve to generate a more accurate
		model.
Template Library:		When setting up project for first time, the user should set this path to Project ITL file
		located in "CorridorModeling folder". (as shown on Step 2. "Copying ITL file into the
		CorridorModeling" folder")
DTM Files Path:		When setting up project for first time, the user should set this path to RDDBS Folder
		located under "CorridorModeling" folder. (also see "DTM Section")

Corridor Modeling Dialog - DDB Section:

You may have noticed that there is no "DDB Section" under Corridor Modeling. This is due to a configuration variable being set to assign the DDB file that defines the styles available in Corridor Modeling (pointing to a global XIN file on the server). When this feature is used the "Import DDB File" option will be disabled under Corridor Modeling Preferences.

Corridor Modeling Dialog - DTM Section

The DTM Section of the Corridor Modeling Dialog is designed to take a Geopak TIN file (Existing Ground TIN file) and convert it to a Corridor Modeling formatted DTM file.

The preferred Roadway method for converting a Geopak TIN to DTM has changed (from previous method shown in “Introduction to Corridor Modeling Class”):

Under "Preferences Section": A “DTM Files Path” has now been added to the dialog window.
The user will now set this path to the “RDDBS Folder (under CorridorModeling Directory)”.
Under "DTM Section": When the conversion process (Import Button) is complete, the converted DTM file will be placed under the RDDBS folder (following the path set under "Preferences Section" - shown above).
Leave the new Converted DTM "File Name" as it is (You do not have to change the name).

Corridor Modeling Dialog - Geometry Section

This tool is used to import Geopak Geometry (such as Chain, Drafting Standard & Profile). When Geometry Data is importing in Corridor Modeling it creates a ALG file. The Corridor Modeling ALG file (contains the horizontal alignment, vertical alignment and supelevation data) is the equivalent to Geopak's GPK file and is stored in the RDDBS sub-folder (under CorridorModeling).

General Step-By-Step - Importing Chain, Drafting Standard and Profile

Chain:		In dropdown list, select Chain (L).
Drafting Standard:		Next to Drafting Standard: select F_Prop CL.
Profile(s):		Under Profile(s) select L..
Add Chain to List:		Select Icon "Add Chain to List" to add Geometry to list.
Import:		Select Import to import Geometry into Corridor Modeling.

Note:		This process will also create a new ALG file (stored in RDDBS folder)

Corridor Modeling Dialog - Plan Graphics

At the moment Roadway Designer does not read plan graphics. Because of this, the Plan Graphics Section (under Corridor Modeling) will be used to import "Plan View Graphical Elements" into Roadway Designer. Templates used in Roadway Designer have been designed to "Target" these plan graphics. Simply put, if a Roadway Designer Template seeks and finds a Plan Graphic it will adjust according (if not it will be drawn at a default setting).

Which Plan Graphics Are Templates Designed To Target ?

Target Type	Microstation Level Name	Roadway Designer "Target" Alignments
Bridge	Prop Roadway Bridge	T_DSN Bridge
Driveway	Prop Conc Driveway	T_DSN DRWY
Driveway Sawcut	User Defined	T_DSN DRWY Sawcut
Edge of Travel	Prop EOT	T_DSN EOT
Guardrail	Prop Guardrail	T_DSN Guardrail
Paved Shoulder	Prop Paved Shoulder	T_DSN Paved Shld
Right of Way	Prop ROW RW Lines	T_DSN ROW
Shoulder Berm Gutter	Prop SBG	T_DSN SBG
Shoulder Point	User Defined (Scratch Level)	T_DSN Shld Pnt
Sidewalk	Prop Conc 4in Sidewalk	T_DSN Sidewalk
Wall	Prop Noise Wall	T_DSN Wall
Exist (Inside) Edge of Pavement	Exist Roads EOP	T_PLN IEEOP
Exist (Outside) Edge of Pavement	Exist Roads EOP	T_PLN OEEOP

How Do Templates Read Plan Graphic Alignments?

Understanding The Plan Graphics Dialog (Proper Sequence)

Choose How To Select Plan Graphics

Symbology / Feature:		Can be setup to create a "Target Corridor" based on "Chain Name", the "Side (left or
		Right)" and a "Beginning & Ending Offset".
Selection Set:		If the Plan Graphic you need to import does not fit within a "Target Corridor", the user
		can choose "Selection Set".

Chain

Chain:

Using dropdown menu, choose Geopak Chain Name.

Add "New Chain Name" & Select "Drafting Standard"

New Chain Name:		User defined name given to each "Imported Plan Graphic"

Drafting Standard:		The "Chain Name" also works in coordination with a "Drafting Standard" name
		("T" stands for Target).

Select Side & Begin / End Offsets

Side:		Designates which side the Template will seek (target) Plan Graphics.

Begin / End Offsets:		Defines the distance (based on left or right side) that the Template will seek (target) Plan
		Graphics.

Filter Tolerances

Horizontal / Variance:		Both Horizontal and Variance filter tolerances are consider together for each pair of cross
		section segments. The middle point is deleted if both segment lengths are less than the
		horizontal filter tolerance while the projected distance between the mid-point and the chord
		between the two end points is less than the Variance tolerance.

Add, Modify & Delete Search Criteria of Selected Row

Add Search Criteria:		Select to add the defined search criteria to the list box. Check the store box on the rows to
		import when you click Import.

Modify Search Criteria:		Select to Modify the selected row.

Delete Search Criteria:		Select to delete the selected row.

Display

Display:		This button displays only the graphics defined in the search criteria of the selected row.
		This allows the user to view the selected alignment before it is imported.

Import

Import:		When the user is satisfied with the New Chain, click "Import". If the "Store" box is checked
		on, the new alignment(s) is imported into the ALG file created when you imported geometry
		data.

Corridor Modeling Dialog - ALG Viewer

The ALG Viewer is used to access and manipulate data directly within the ALG file. The two main reasons to use the ALG Viewer are::

Delete alignments from the ALG file
Display alignments for review

Click on the ALG Tab to list the alignments in the ALG file. For each alignment displayed, the associated drafting standard and display status are shown. The user can select single or multiple alignments.

Click to Display all selected alignments

Click to Undisplay all selected alignments

Click to Delete all selected alignments from ALG file. As alignments are deleted from the ALG file, the software synchronizes the Geometry and Plan graphics portions of Corridor Modeling.