1 BENEFITS OF A MULTI-YEAR TRAVEL MODEL NETWORK CODING ENVIRONMENT TRB Planning Applications...

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BENEFITS OF A MULTI-YEAR BENEFITS OF A MULTI-YEAR TRAVEL MODEL NETWORK TRAVEL MODEL NETWORK

CODING ENVIRONMENTCODING ENVIRONMENT

TRB Planning Applications ConferenceTRB Planning Applications ConferenceMonday, May 7, 2007 Monday, May 7, 2007

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BENEFITS OF A MULTI-YEAR BENEFITS OF A MULTI-YEAR TRAVEL MODEL NETWORK TRAVEL MODEL NETWORK

CODING ENVIRONMENTCODING ENVIRONMENT

Prepared by:Prepared by:Francisco Torres and Ken Cervenka Francisco Torres and Ken Cervenka

BENEFITS OF A MULTI-YEAR TRAVEL MODEL BENEFITS OF A MULTI-YEAR TRAVEL MODEL NETWORK CODING ENVIRONMENTNETWORK CODING ENVIRONMENT

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Travel Roadway Networks at Travel Roadway Networks at NCTCOGNCTCOG

5,000 square-mile of the 5,000 square-mile of the metropolitan planning areametropolitan planning area

32,000 roadway links 32,000 roadway links 14,000 miles 14,000 miles Roadway networks associated to the Roadway networks associated to the

several planning years.several planning years. Maintained as separate GIS layers in Maintained as separate GIS layers in

TransCADTransCAD


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North Central Texas RegionNorth Central Texas Region


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Dallas-Fort Worth Metropolitan Dallas-Fort Worth Metropolitan Planning AreaPlanning Area


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Multi-Year Network TasksMulti-Year Network TasksSetting Guidelin

esImprovin

g existing

data Merging of

current networks

Designing a user interface


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Source of Existing NetworksSource of Existing Networks

Base Network1999

2012

20152025

2030

2005

2007


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Current Network Updates Process Current Network Updates Process Base Network

19992005

2012

2025 2015

2007

2030


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Drawbacks of Maintaining Several Drawbacks of Maintaining Several Versions Versions

Modifications of alignment and Modifications of alignment and attributes are done independentlyattributes are done independently

Updates should be propagated to Updates should be propagated to future planning yearsfuture planning years

Amount of maintenance work is Amount of maintenance work is proportional to the number of proportional to the number of versionsversions

Failure to propagate updates results Failure to propagate updates results in inconsistency of versionsin inconsistency of versions


1010

2030

2025

2015

2012

2009

2007

Multi-Year ConceptMulti-Year Concept

2005

Base Network1999


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Benefits of Multi-Year NetworkBenefits of Multi-Year Network Modifications of alignment and attributes Modifications of alignment and attributes

are done at once for several years.are done at once for several years. Easier to maintain. Updates are Easier to maintain. Updates are

propagated automatically to future propagated automatically to future planning yearsplanning years

Amount of maintenance work is reduced Amount of maintenance work is reduced considerablyconsiderably

The network of a specific year can be The network of a specific year can be defined as a subset of the comprehensive defined as a subset of the comprehensive line layerline layer

Improved consistency among yearsImproved consistency among years


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Improving Existing LayersImproving Existing Layers

1.1. Re-Alignment. Reshape based on All-Re-Alignment. Reshape based on All-Streets network and aerials photosStreets network and aerials photos

2.2. Rectification. Check topology, redesign Rectification. Check topology, redesign ramps, identify medians and add access ramps, identify medians and add access roads to transit.roads to transit.

3.3. Verification of Current Attributes . Verification of Current Attributes . Number of lanes, signalized Number of lanes, signalized intersections, horizontal signage.intersections, horizontal signage.


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Re- alignment of networkRe- alignment of network


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Compatibility with detailed All-Streets networkCompatibility with detailed All-Streets network


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Intersection of 4 Roads with MediansIntersection of 4 Roads with Medians


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Rectification of RampsRectification of Ramps


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Access to Train/Rail stationsAccess to Train/Rail stations


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Multi-Year Network Basic FeaturesMulti-Year Network Basic Features

Only one file is usedOnly one file is used Need of additional editing tools Need of additional editing tools

to identify overlapping linksto identify overlapping links Start and ending years must be Start and ending years must be

defineddefined


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Example of Future InterchangeExample of Future Interchange


2020

Example of Railroad CrossingExample of Railroad Crossing


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Treatment of future alignmentsTreatment of future alignments


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Storing Attribute DataStoring Attribute Data


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Merging Year NetworksMerging Year Networks

1999

2005

2007

2015

2025

2030


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Merging Existing NetworksMerging Existing Networks


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Comparing 2005 & 2030Comparing 2005 & 2030


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Comparing 2005 & 2030Comparing 2005 & 2030


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2030Links =31,139

17,76413,3758,8211999Links=22,196

14,53816,6017,4582005Links=24,059

13,84317,2967,5022007Links=24,798

13,40917,7277,6012009Links=25,328

12,73018,4067,7552012Links=22,161

Spatial Similarity of NetworksSpatial Similarity of Networks

9,12722,0096,0282015Links=28,037

50630,630812025Links=30,711


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Tasks to Merge Year NetworksTasks to Merge Year Networks

Identify common alignmentsIdentify common alignments Consider future alignmentsConsider future alignments Assign a life cycle to every alignment Assign a life cycle to every alignment

(start and end year)(start and end year) Fix inconsistencies of attributes for Fix inconsistencies of attributes for

similar alignmentssimilar alignments Identify life cycle of attributesIdentify life cycle of attributes


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Master Network InterfaceMaster Network Interface


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Improvements to Existing Network Improvements to Existing Network Editing ToolsEditing Tools

Multi-User environment for codersMulti-User environment for coders Automatic error checking of attribute dataAutomatic error checking of attribute data Keeping a log of changes made to master Keeping a log of changes made to master

multiyear network (who, when & what) multiyear network (who, when & what)


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Merging Networks from CodersMerging Networks from Coders

Track Updates

CheckConnectivity

Fix Errors Fix

Errors

Fix Errors Fix

Errors


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Multi-User EnvironmentMulti-User Environment

Prevent

Errors

Prevent

Errors

Prevent

Errors

Prevent

Errors

Track Updates


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Future StepsFuture Steps Multi-Year and Multi-User network coding Multi-Year and Multi-User network coding

interfaceinterface Automatic communication of network Automatic communication of network

changes from regional agencieschanges from regional agencies Integration with Other Datasets (TIP and Integration with Other Datasets (TIP and

transportation infrastructure transportation infrastructure geodatabases) geodatabases)

Display/Update of Year Information on the Display/Update of Year Information on the Web Web

Extending coverage of roadway network to Extending coverage of roadway network to the full 16-county NCTCOG area the full 16-county NCTCOG area


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Network UpdatesNetwork Updates

Alternatives

Final recommendations

Corridor Study

NCTCOG All-Streets

Layer

Multi-Year Network

Updates

Checks

NCTCOG All-Streets

Layer

Multi-Year Network

Updates

Checks

2007

2008

Alternatives

Final recommendations

Corridor Study

NCTCOG All-Streets

Layer

Multi-Year Network

Updates

Checks2009


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GIS Database IntegrationGIS Database IntegrationMulti-Year

Network

Multi-YearTransportationGeodatabase

Infrastructure

DemandAccidents

Demand


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Questions?Questions?

Thank You!Thank You!

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