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

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

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

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

North Central Texas RegionNorth Central Texas Region

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

Multi-Year Network TasksMulti-Year Network TasksSetting Guidelin

esImprovin

g existing

data Merging of

current networks

Designing a user interface

Source of Existing NetworksSource of Existing Networks

Base Network1999

20152025

Current Network Updates Process Current Network Updates Process Base Network

19992005

2025 2015

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

Multi-Year ConceptMulti-Year Concept

Base Network1999

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

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.

Re- alignment of networkRe- alignment of network

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

Intersection of 4 Roads with MediansIntersection of 4 Roads with Medians

Rectification of RampsRectification of Ramps

Access to Train/Rail stationsAccess to Train/Rail stations

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

Example of Future InterchangeExample of Future Interchange

Example of Railroad CrossingExample of Railroad Crossing

Treatment of future alignmentsTreatment of future alignments

Storing Attribute DataStoring Attribute Data

Merging Year NetworksMerging Year Networks

Merging Existing NetworksMerging Existing Networks

Comparing 2005 & 2030Comparing 2005 & 2030

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

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

Master Network InterfaceMaster Network Interface

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)

Merging Networks from CodersMerging Networks from Coders

Track Updates

CheckConnectivity

Fix Errors Fix

Errors

Fix Errors Fix

Errors

Multi-User EnvironmentMulti-User Environment

Prevent

Errors

Prevent

Errors

Prevent

Errors

Prevent

Errors

Track Updates

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

Network UpdatesNetwork Updates

Alternatives

Final recommendations

Corridor Study

NCTCOG All-Streets

Multi-Year Network

Updates

Checks

NCTCOG All-Streets

Multi-Year Network

Updates

Checks

Alternatives

Final recommendations

Corridor Study

NCTCOG All-Streets

Multi-Year Network

Updates

Checks2009

GIS Database IntegrationGIS Database IntegrationMulti-Year

Network

Multi-YearTransportationGeodatabase

Infrastructure

DemandAccidents

Demand

Questions?Questions?

Thank You!Thank You!

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