Accessing and Using Roadway and Crash Data

Tom Casson

Menard County Engineer/IACE

and

Doug Keirn

IDOT - District 9

Programming Engineer

Roadway Data

Roadway Data Collection

• State Road System – Input from Plans

• Local Road System – From Plans and Inventoried every 5 Years

• Structure Data – When Bridge is Opened, Construction Contract is Let, and After Inspections

Roadway Data Sources• IRIS Roadway Database from IDOT

• ISIS Structure Database from IDOT

• Filter/Query Data Field Examples• Outside Shoulder Width/Type (2 Fields)• Number of Lanes/Lane Width• Traffic Volumes(ADT & Truck)• Maintenance/Jurisdiction• Functional Classification• Surface Type/Year/CRS• Speed Limit• NHS Route

Manual Describing Structure Data

Manual Describing Railroad Data

Manual Describing Roadway Data

http://apps.dot.illinois.gov/gist2/

Sources for Viewing Data

•ESRI ArcMap GIS Software

•ESRI GIS Online

•Google Earth/Maps

•Open Source GIS Software

ESRI ArcMap

GIS Online

•Public Account

•Minimal Features

•Allows Viewing and Filtering IDOT Shapefiles

Google Earth

Roadway Layer

Structure Layer

Open Source - QGIS

GETTING AROUND ILLINOIS

Crash Data

Crash Summary Report

5% Locations

SAFETY PORTAL