AASHTO Technology Implementation Group (TIG)

FY 2007 AASHTO TIG Focus Technologies

Linear Reference System (LRS)

Steve Kadolph – Iowa DOTJonathan (J.J.) DuChateau – Wisconsin DOT

Oscar Jarquin – California DOTEric Abrams – Iowa DOT

Technology Implementation GroupTechnology Implementation Group

AASHTO’s TIG invests time and money to accelerate AASHTO’s TIG invests time and money to accelerate selected technology adoption by agencies nationwide. selected technology adoption by agencies nationwide.

TIG’s lead states team objective is to share information TIG’s lead states team objective is to share information with AASHTO member agencies to improve the Nation’s with AASHTO member agencies to improve the Nation’s transportation system transportation system

The LRS TIG objectives areThe LRS TIG objectives are Knowledge and experience related to LRS implementationKnowledge and experience related to LRS implementation Webinars to share experiences and educate othersWebinars to share experiences and educate others Customized state visitsCustomized state visits Iowa’s LRS Maintenance Tool and system at no chargeIowa’s LRS Maintenance Tool and system at no charge

NCHRP 20-27 (2) LRS ModelNCHRP 20-27 (2) LRS Model Linear Referencing System Data ModelLinear Referencing System Data Model Developed in response to the need to integrate linearly Developed in response to the need to integrate linearly

referenced datareferenced data Includes Includes

Multiple linear referencing methods (LRM)Multiple linear referencing methods (LRM) Multiple cartographic representations Multiple cartographic representations Multiple Network RepresentationsMultiple Network Representations Multiple Route NamesMultiple Route Names

Business data integration is supported through Business data integration is supported through transformations among methods, networks and transformations among methods, networks and cartographic representations by associating with a cartographic representations by associating with a central linear datumcentral linear datum

What Does a 20-27 (2) System What Does a 20-27 (2) System ContainContain

Spatial representation of a transportation systemSpatial representation of a transportation system Accurate CenterlineAccurate Centerline Multiple Cartographic abstraction layersMultiple Cartographic abstraction layers

Datum most stable layer over timeDatum most stable layer over time Network LayerNetwork Layer

Links and Nodes that define the networkLinks and Nodes that define the network LRM LocationLRM Location

Data required for those methodsData required for those methods Programs and interfaces to supply a LRS location to Programs and interfaces to supply a LRS location to

business databusiness data

What Does a 20-27 (2) System What Does a 20-27 (2) System Does Not ContainDoes Not Contain

Business data is separated from the 20-27 Business data is separated from the 20-27 (2) model order to minimize the impact on (2) model order to minimize the impact on existing business dataexisting business data

Why Implement a 20-27 (2) ModelWhy Implement a 20-27 (2) Model

Single source for transportation systemsSingle source for transportation systemsNavigable networkNavigable networkAs many LRMs, routes and cartographies As many LRMs, routes and cartographies

as neededas neededMinimizes changes to existing business Minimizes changes to existing business

datadataCan support needs of multiple business Can support needs of multiple business

areasareas

TIG LRS Team MembersTIG LRS Team Members Iowa Lead StateIowa Lead State

Peggi Knight Peggi Knight ( Team Leader)( Team Leader)

Eric AbramsEric Abrams (Gis Coordinator)(Gis Coordinator)

Karen Carroll Karen Carroll (LRS Manager)(LRS Manager)

Mike Clement Mike Clement (QA LRS)(QA LRS)

Steve KadolphSteve Kadolph (Technical Exp.)(Technical Exp.)

Ryan Wyllie Ryan Wyllie (QA LRS)(QA LRS)

Other StatesOther States David Blackstone (Ohio)David Blackstone (Ohio) Jonathan (J.J.) DuChateau Jonathan (J.J.) DuChateau

(Wis)(Wis) John Farley (N. Car.)John Farley (N. Car.) Oscar JarquinOscar Jarquin (Calif.) (Calif.) Thomas Martin (Minn.)Thomas Martin (Minn.)

o Non StateNon State Tim Bisch Tim Bisch (Bentley Systems, Inc.)(Bentley Systems, Inc.)

Dave Fletcher Dave Fletcher (Geographic (Geographic Paradigm Computing, Inc. )Paradigm Computing, Inc. )

Mark Sarmiento Mark Sarmiento (FHWA)(FHWA)

Iowa’s LRS ExperienceIowa’s LRS Experience

AgendaAgenda

What Iowa’s LRS includesWhat Iowa’s LRS includes

What do the DOT’s business units gainWhat do the DOT’s business units gain

What allowed Iowa to succeedWhat allowed Iowa to succeed

Iowa’s LRSIowa’s LRS

Implementation of NCHRP 20-27 Implementation of NCHRP 20-27 model. Which separates business model. Which separates business data from the location components data from the location components of linear features (roads, navigable of linear features (roads, navigable rivers, railroads, pipelines, etc.).rivers, railroads, pipelines, etc.).

NCHRP 20-27 ModelNCHRP 20-27 Model

LRS Components

CoordinateRoute

ReferencePost

CoordinateRoute

Milepoint StationingLiteral

Description

BaseRecordCrash PMIS Inventory Project

DataProgram

CenterlineRepresentation 2

CenterlineRepresentation 3

CenterlineRepresentation 1

AddressRange

LRS ComponentsLRS Components (all public roads 114,000 miles)(all public roads 114,000 miles)

CartographyCartography Traveled Way Spatial Traveled Way Spatial Roadway Spatial Roadway Spatial

Datum Datum (Anchor Sections & Points)(Anchor Sections & Points) Network Network (Transport Links & Nodes)(Transport Links & Nodes)

RoutesRoutes Parsed NamesParsed Names PathsPaths

LRM Components (i.e. Reference Post)LRM Components (i.e. Reference Post)

Transformations between Transformations between supported business location supported business location referencing methods (LRM)referencing methods (LRM)

A common linear description of the network that can relate all the methods.

LRM

LRM

LRM

LRM

LRM

LRM

Datum

Transform

Transform

Transform

How does LRS benefit the DOTHow does LRS benefit the DOTImproved AccuracyImproved Accuracy

Entire road system (all public roads) are Entire road system (all public roads) are created based upon same standardcreated based upon same standard

A separate abstraction layer call Roadway A separate abstraction layer call Roadway exist that provides a single representation exist that provides a single representation of divided roadwaysof divided roadways

The system is represented over time (from The system is represented over time (from 1/1/2001) 1/1/2001)

How does LRS benefit the DOTHow does LRS benefit the DOTCentral location of dataCentral location of data

Route names for all roadway systemsRoute names for all roadway systems

One navigable networkOne navigable network

Centerline for all roadsCenterline for all roads

History of road network History of road network

How does LRS benefit the DOTHow does LRS benefit the DOTClearly defined rules and practicesClearly defined rules and practices

LRM usage and resultsLRM usage and resultsData staged has same location componentData staged has same location componentProcesses and QC processes clearly definedProcesses and QC processes clearly defined

Metadata for all LRS componentsMetadata for all LRS componentsSource for centerlines identified and datedSource for centerlines identified and datedWho owns LRS components knownWho owns LRS components known

LRS how did Iowa succeedLRS how did Iowa succeed

Business case for creation of LRSBusiness case for creation of LRS

Division Level SponsorsDivision Level Sponsors

Business data kept separate from locationBusiness data kept separate from location

Business unit ownership LRSBusiness unit ownership LRS

Active project management Active project management

Implementation IssuesImplementation Issues

Time span (Time span (19981998 2001-2009) 2001-2009)Digitize roads (2001-2005)Digitize roads (2001-2005)Develop maintenance tool (2003-2008)Develop maintenance tool (2003-2008)Create LRS components (2004-2009)Create LRS components (2004-2009)

Cost to develop maintenance toolCost to develop maintenance toolDollarsDollarsMultiple vendorsMultiple vendors

Wisconsin’s LRS ExperienceWisconsin’s LRS Experience

LRS Components

CoordinateRoute

ReferencePost

CoordinateRoute

Milepoint StationingLiteral

Description

BaseRecordCrash PMIS Inventory Project

DataProgram

CenterlineRepresentation 2

CenterlineRepresentation 3

CenterlineRepresentation 1

AddressRange

Wisconsin’s LRSWisconsin’s LRS Similarities to IowaSimilarities to Iowa

Most concepts in Iowa’s slides also apply Most concepts in Iowa’s slides also apply to WI’s implementationto WI’s implementation

Separate business data components from Separate business data components from LRSLRS

Linear Datum that serves as a LRS “hub”Linear Datum that serves as a LRS “hub”Multiple LRMs supported Multiple LRMs supported (each tied to the (each tied to the

Linear Datum)Linear Datum)

LRM

LRM

LRM

LRM

LRM

LRM

Datum

Wisconsin’s LRSWisconsin’s LRSDifference from IowaDifference from Iowa

WI’s Linear Datum & Network are one and the WI’s Linear Datum & Network are one and the samesame

Built state roads (1993), then local roads later Built state roads (1993), then local roads later (2002)(2002)

In-house solution In-house solution (mainly because commercial (mainly because commercial solutions didn’t exist at this time)solutions didn’t exist at this time)

Best practice to store Linear Datum location Best practice to store Linear Datum location instead of LRM for business event datainstead of LRM for business event data

Iowa has put more emphasis on statistics for Iowa has put more emphasis on statistics for determining linear measurement accuracydetermining linear measurement accuracy

Wisconsin’s ExperienceWisconsin’s Experience

17 years production experience with these 17 years production experience with these LRS conceptsLRS concepts

Design driven by Information Engineering Design driven by Information Engineering principlesprinciples

LRS design was essentially a data LRS design was essentially a data modeling & normalization exercisemodeling & normalization exerciseResults in many of the 20-27 conceptsResults in many of the 20-27 concepts

Allows management of one LRS Allows management of one LRS component not to dictate management of component not to dictate management of another LRS componentanother LRS component

Wisconsin’s ExperienceWisconsin’s Experience

Designed so linear data processing can be Designed so linear data processing can be done outside of GIS softwaredone outside of GIS software

Only “GIS” layer required is a roadway Only “GIS” layer required is a roadway centerline representationcenterline representation

LRS transformation processes to create LRS transformation processes to create cartographic representation of business cartographic representation of business datadata

Wisconsin’s ExperienceWisconsin’s Experience

Conceptual & design details are important Conceptual & design details are important to understandto understandEntity Definitions, Business Rules, Use CasesEntity Definitions, Business Rules, Use Cases

Such as:Such as:What is a “road”?What is a “road”?Where does a route start/end?Where does a route start/end?What events cause birth/death of a LRS What events cause birth/death of a LRS

object?object?

Wisconsin’s ExperienceWisconsin’s Experience

Implementation considerations for LRS Implementation considerations for LRS entities need to be weighedentities need to be weighed Is each linear location uniquely described?Is each linear location uniquely described?How many nodes should represent an How many nodes should represent an

intersection?intersection?What constitutes a divided roadway?What constitutes a divided roadway?What point should be used for What point should be used for

merging/diverging roadways?merging/diverging roadways?

Wisconsin’s ExperienceWisconsin’s Experience

Additional LRS functionality considerationsAdditional LRS functionality considerations

(Some things not explicitly mentioned in 20-27)(Some things not explicitly mentioned in 20-27) Ability to associate still valid portions of old Ability to associate still valid portions of old

Anchor Sections to its replacement(s)Anchor Sections to its replacement(s)Ability to associate opposite direction Anchor Ability to associate opposite direction Anchor

SectionsSectionsThe temporal aspect of this data is much The temporal aspect of this data is much

harder than it seemsharder than it seems

California’s LRS ExperienceCalifornia’s LRS Experience

California Business Driver… California Business Driver… Corridor ManagementCorridor Management

Local Jurisdiction 2 – Traffic Signal System

Local Jurisdiction 1 – Traffic Signal System

Bus Company – AVL system

State DOT – Freeway Management System

Regional Rail Agency – Train Management System

P

Local Jurisdiction 2 – Traffic Signal System

Local Jurisdiction 1 – Traffic Signal System

Bus Company – AVL system

State DOT – Freeway Management System

Regional Rail Agency – Train Management System

P

Multiple LRM’sMultiple LRM’s

County Route Postmile

ORA 405 R 23.000

County Route KiloPost

ORA 405 R 33.877

Security

Internet

Other TIMIGIS

SOA(Service Oriented Architecture)

Java/XML Message Bus

TASASData Files

Applications

TSM

Hwy.Inven.

HPMS

Programming

TrafficVolume

OE-PSE

PMS

TMCs(loops, CMS, etc.) Web

Pages

SOA output via GIS =Planning, PID, Design, Proj. Mgt., Constr., Operations, etc. for system performance, geometrics, etc.

Other

CTIS PEARParcels

Others

GoogleEarth

CAD

Others

Public

StateAgencies

Locals

CT PASSMain Frame External Sources

Linear Referencing

Search FunctionsMapping

Other Functions

St. Hwy Inv.

HPMS Envir. Doc MgtAsset Mgt

SHARED FUNCTIONS

ENTERPRISE SYSTEM ENTERPRISE SYSTEM INTEGRATIONINTEGRATION

Service Oriented Architecture Service Oriented Architecture (SOA)(SOA)

Identifying Common SOA Identifying Common SOA ComponentsComponents

Common Mapping Functions Common Search Functions

Sharable Functions PEAR Specific Functions

Common Metadata Functions

TIMI Specific Functions

CTIS Specific Functions

Display associated media file Export RSS feed

Read traffic information

sources Display attribute information

window

Import CTIPS projects

Edit planned project

Login

Manage Users

Validate location

Map Navigation Functions

Map Cartographic Functions

Metadata search

Map Components(scale bar, north

arrow, etc)Legend Functions

Mao List Functions Map Print Functions

Edit metadata

Help Functions

Attribute Search

Common table functions

Print Report

Clear Project Set

Login

Manage Users

Validate location

Map Navigation Functions

Map Cartographic Functions

Search for project

Search listMetadata search

Map Components(scale bar, north

arrow, etc)Legend Functions

Map Print FunctionsSpatial Search and

Select

Edit metadata

Help Functions

Attribute SearchProject Set Overlap

Report

Project Set Summary Report

(average cost, total cost, etc)

Project Set ExportCommon table

functions

Print Report

Search Adjoining Projects

Submit, Review and Approve

Create audit log

Upload site data

Spatially review information

Initiate PEAR Request

Define activities and resources

Track activities

Develop cost estimates

ID need for risk assessment

Append data, maps to request

Map Specialty Scoping Areas

Compile documentPublish document

Office of GISService Oriented

Architecture Diagram

(Confederated Level)

10/30/06

Map List Functions

Cloud

GIS Files

Cadastral

CADD Post Mile Info

Geodatabase / Web ServicesGeodatabase / Web Services

MicroStationMicroStation

Geospatial DataGeospatial Data

GISGIS

WebWeb

GoogleGoogle

EarthEarth

Geospatial Data ManagementGeospatial Data Management

Postmile Lookup ToolPostmile Lookup Tool

ArcGIS Tool BarArcGIS Tool Bar

The LRS TIG objectives areThe LRS TIG objectives are

•Knowledge and experience related to LRS implementationKnowledge and experience related to LRS implementation•Webinars to share experiences and educate othersWebinars to share experiences and educate others•Customized state visitsCustomized state visits•Iowa’s LRS Maintenance Tool and system at no chargeIowa’s LRS Maintenance Tool and system at no charge

Technology Implementation GroupTechnology Implementation Group

The LRS TIG objectives areThe LRS TIG objectives are Knowledge and experience related to LRS implementationKnowledge and experience related to LRS implementation Webinars to share experiences and educate othersWebinars to share experiences and educate others Customized state visitsCustomized state visits Iowa’s LRS Maintenance Tool and system at no chargeIowa’s LRS Maintenance Tool and system at no charge