Using GIS Networks to Represent Model Networks May 19, 2009 Hoyt Davis & Chunyu Lu Gannett Fleming, Inc.

Outline 2 Background Introduction Background Introduction Generating True Shape Networks in Travel Forecast Model Generating True Shape Networks in Travel Forecast Model Incorporate Into Cube Environment Incorporate Into Cube Environment New Technology New Technology Questions? Questions?

Background Introduction 3 Former Florida highway model networks were generally “stick- figured” networks that show traffic flows from one node point to another using straight lines. Former Florida highway model networks were generally “stick- figured” networks that show traffic flows from one node point to another using straight lines. The “stick-figured” networks usually: The “stick-figured” networks usually:  Do not have to represent the highway network in a visually pleasing way;  Are commonly modified to allow some roadway curvature by breaking their network links into smaller pieces;  Do not incorporate full functionality from ArcGIS Engine and Geodatabase;  Make the highway network less efficient causing longer model processing times. The latest versions of Cube Voyager allow users to utilize true shape networks which use GIS detail accuracy in its integrated network environment. The latest versions of Cube Voyager allow users to utilize true shape networks which use GIS detail accuracy in its integrated network environment.

“Stick-figured” Network 4

Background Introduction FDOT District 7 and District 5 have requested for Gannett Fleming to develop GIS-based highway networks for initial use in their Regional Planning Models. FDOT District 7 and District 5 have requested for Gannett Fleming to develop GIS-based highway networks for initial use in their Regional Planning Models. The new GIS-based network is expected to: The new GIS-based network is expected to:  Improve the accuracy of the model in terms of truer GIS distances of highway facilities;  Decrease the number of highway links in the model networks and therefore decrease the model processing times;  Incorporate full functionality of the ArcGIS Engine and Geodatabase technology;  Provide for better integration with future versions of the Cube Voyager software. 5

True Shape Network 6

Outline 7 Background Introduction Background Introduction Generating True Shape Networks in Travel Forecast Model Generating True Shape Networks in Travel Forecast Model Incorporate Into Cube Environment Incorporate Into Cube Environment New Technology New Technology Q&A Q&A

How Did We Get Started… Available data resources: Available data resources:  State TeleAtlas/GDT roadway data  Aerial photos  Existing model networks There are two options to get started: There are two options to get started:  Start with available non-transportation base true shape GIS networks to clean network attributes and merge links; or  Start with existing model networks and realign network links based on true shape curvatures from true shape GIS networks. It was more efficient to start from the model networks and manually realign the network to true shape curvatures. It was more efficient to start from the model networks and manually realign the network to true shape curvatures. 8

Challenges #1: Consolidate the network from small link pieces; #1: Consolidate the network from small link pieces; #2: Manually match every vertex to the true shape curve; #2: Manually match every vertex to the true shape curve; #3: Incorporate the true shape network into the Cube environment and the model flow seamlessly. #3: Incorporate the true shape network into the Cube environment and the model flow seamlessly.Solutions: Link consolidation based on area type, facility type, and number of lane combination; Link consolidation based on area type, facility type, and number of lane combination; Link conflation tool developed using Visual Basic for Applications in the ArcGIS Environment; Link conflation tool developed using Visual Basic for Applications in the ArcGIS Environment; “Build Network from Shape File” Tool and Cube script. “Build Network from Shape File” Tool and Cube script. 9

Other Challenges Coordinate with the Department and the MPOs to determine all improvements to the highway system between existing network and the new base year network. Coordinate with the Department and the MPOs to determine all improvements to the highway system between existing network and the new base year network. More network attributes were required to be added: More network attributes were required to be added:  Posted Speed  Count Sources and Count Station ID  Local /MPO/ County Screenlines Highway network support file development included: Highway network support file development included:  Toll link file  Time penalty and turn prohibitor file  Transit station file Use Cube scripting to develop a process to convert the GIS network shape file to a model network. Use Cube scripting to develop a process to convert the GIS network shape file to a model network. 10

Link Consolidation 11

Geometry Conflation Tool 12 Target: GDT Layer Model Network

Select Nodes for Shortest Path 13

Run Shortest Path 14

Geometry Conflation 15 Link Match Node Match

Link Direction vs. Two-way Attribute 16

New Roadway Attributes 17 Road Name and Alternative Road Name Road Name and Alternative Road Name Posted Speed Posted Speed Traffic Count Sources and Station ID Traffic Count Sources and Station ID Local/County/MPO Screenlines Local/County/MPO Screenlines Roadway Label and Number Roadway Label and Number Federal Functional Classification code Federal Functional Classification code

Road Names and Number of Lanes 18

Federal Functional Classification 19

Network Link Data Dictionary 20

Renumber Highway Nodes 21

Highway Links and Nodes by County 22 The true shape network means new features: The true shape network means new features: Specify external and dummy centroids Specify external and dummy centroids Node renumbering by County Node renumbering by County Node number sorted by X and Y coordinates Node number sorted by X and Y coordinates Highway links and centroid connectors summary by County Highway links and centroid connectors summary by County

Outline 23 Background Introduction Background Introduction Generating True Shape Networks in Travel Forecast Model Generating True Shape Networks in Travel Forecast Model Incorporate Into Cube Environment Incorporate Into Cube Environment New Technology New Technology Q&A Q&A

Build Cube Network from True Shape 24

Script in Cube Voyager 25

Geodatabase Manager in Cube 26

True Shape Highway Network 27

Edit Highway Links in Cube 28 Add Highway Links Add Highway Links Copy links attributes Copy links attributes Update node number Update node number Move Links Move Links Node snapping Node snapping Update node number Update node number Link direction Link direction Delete Links Delete Links Link Split Link Split

Transit Network in Cube 29

Edit Transit Network 30

Outline 31 Background Introduction Background Introduction Generating True Shape Networks in Travel Forecast Model Generating True Shape Networks in Travel Forecast Model Incorporate Into Cube Environment Incorporate Into Cube Environment New Technology New Technology Q&A Q&A

Outline 33 Background Introduction Background Introduction Generating True Shape Networks in Travel Forecast Model Generating True Shape Networks in Travel Forecast Model Incorporate Into Cube Environment Incorporate Into Cube Environment New Technology New Technology Q&A Q&A