Chicago Traffic Signals Database Presented by: Abraham Emmanuel Traffic Management Authority – Office of Emergency Management and Communication (OEMC) City of Chicago

Overview 26,000 intersections (Approximately) 2,800 + signals 24 Interconnects (480 signals) Three agencies Chicago Department of Transportation Bureau of Electricity Office of Emergency Management – Traffic Management Authority. Few Signals maintained by IDOT

26,000 intersections (Approximately)

2,800 + signals

24 Interconnects (480 signals)

Three agencies

Chicago Department of Transportation

Bureau of Electricity

Office of Emergency Management – Traffic Management Authority.

Few Signals maintained by IDOT

Overview (Cont) Some form of electronic data repository existed since 1996. Not up-to-date since 2003 New system developed in 2006 based on the legacy data.

Some form of electronic data repository existed since 1996.

Not up-to-date since 2003

New system developed in 2006 based on the legacy data.

Challenge No one to one mapping between signals and intersections. Signal A Signal B Signal C Signal A

No one to one mapping between signals and intersections.

Separated Signal from the Geography (intersection) Signal 1 Signal 1A Signal 1B Signal 1C Intersection X Intersection Y Intersection Z Signal 2 Signal 2A Intersection W

Chicago Intersections Linked Signals to City Intersections using Lat/Log Chicago Intersections

City of Chicago Signalized Intersections End Product

What data is collected?

A Lot of Information…

Timing & Timing Plans…

Links to Video & Still Images…

Cable & Foundation Plans…

Intersection Details… Maps & Aerial Images…

… And Can Track Work Order.

Technology Microsoft Access front-end interface Oracle Express Back End ArcView GIS for mapping

Microsoft Access front-end interface

Oracle Express Back End

ArcView GIS for mapping

Future Plans Migrate to an Oracle 10g database. Develop HTML/JAVA front-end for data sharing across departments. Link with… The Traffic Crash database ADT database Surveillance Cameras Provide up-to-date signal status information to citizens through the City of Chicago website.

Migrate to an Oracle 10g database.

Develop HTML/JAVA front-end for data sharing across departments.

Link with…

The Traffic Crash database

ADT database

Surveillance Cameras

Provide up-to-date signal status information to citizens through the City of Chicago website.

Once completed the system should facilitate comprehensive traffic analysis Top Crash Intersections without a traffic signal

Questions? Chicago Signal Interconnect

Contact Information.. Traffic Management Authority - Office of Emergency Management & Communication 120 N Racine, Suite 200 Chicago, IL 60607 David Zavattero Deputy Director [email_address] (312) 743-7372 Abraham Emmanuel Principal Systems Programmer [email_address] (312) 743-7381