CTS Events
November 14, 2012

Dr. Nebiyou Tilahun, UPP, presents a seminar entitled "An agent based model of origin destination estimation (ADOBE)" Wednesday, November 14th at 4:00 pm in Rm 1127 SEO


November 7, 2012

Mr. Thomas Murtha, CMAP, will address the CTS-IGERT community at 4:00 p.m. in Room 1127 SEO.


October 24, 2012

Please join us in welcoming Dr. Bo Zou, CME, on Wednesday, October 24th, Room 1127 SEO, 4:00 p.m.


CTS Happenings
September 25, 2012

Award Received by Joshua Auld, CTS-IGERT alumnus.


April 20, 2012

Congratulations to James Biagioni, CTS Fellow and CS PhD candidate, winner of the Dean's Scholar award.


January 2, 2012

James Biagioni, CTS Fellow, receives "Best Presentation Award" at SenSys2011


July 30, 2010

Dr. Ouri Wolfson, Dr. Phillip Yu, and Leon Stenneth, CS student and CTS Associate, recently had a paper accepted to the 6th IEEE International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob 2010).


October 30, 2009

CTS welcomes Dr. Darcy Bullock, School of Civil Engineering, Purdue University, who will present a seminar entitled

Download: "Visualization and Assessment of Arterial Progression Quality Using High Resolution Signal Event Data and Measured Travel Time"

"Visualization and Assessment of Arterial Progression Quality Using High Resolution Signal Event Data and Measured Travel Time"

Friday, October 30, 2009
11:00 - 12:30 p.m.
Engineering Research Facilities (ERF)
842 West Taylor Street


Coordination is essential to providing the highest possible quality of service on signalized arterial through movements, and travel time is its most accurate yet most expensive measure. This talk presents a methodology for evaluating signal coordination that combines high resolution signal data with travel time measurement using Bluetooth device MAC address matching. The Purdue Coordination Diagram (PCD) is introduced as a tool for visualizing and quantitatively evaluating signal performance and identifying opportunities for improvements. This diagram plots the arrival time of each vehicle at an intersection using input from setback detectors, in combination with information about the phase state (red and green intervals). On a cycle-by-cycle basis, it is possible to view the arrival of each platoon relative to the start and end of green. At a higher level, the performance of the green band can be qualitatively evaluated through visual inspection of the concurrence (or lack of) of vehicle platoons within the green bands. Quantitative measures such as the percent of vehicles arriving on green can be extracted from aggregation of the data. The impact of offset adjustments can be predicted from manipulation of PCDs for an arterial corridor. Arterial travel times were measured using MAC address matching using intersection and midblock detecting stations to identify time periods with opportunities to make timing improvements. Using this technique, optimal offsets were calculated for a Saturday plan on a four-intersection signalized corridor, and the operational impacts were estimated. These offsets were then implemented. The number of vehicles in the corridor arriving on green increased from 56% to 66%, while median northbound travel time observed by tracking Bluetooth devices decreased by 1.2 minutes. The talk concludes by discussing the application of Bluetooth tracking to airport security lines and work zone origin-destination research.


Darcy Bullock joined the Purdue civil engineering faculty in January 1998. Bullock grew up in Guilford, Vermont and attended Guilford Central School and Brattleboro Union High School. He received a B.S. in Civil Engineering from the University of Vermont (1987), and a M.S. (1988) and a Ph.D.(1992) in Civil Engineering from Carnegie Mellon University. Dr. Bullock is a Registered Professional Engineer in the States of Louisiana and Indiana. Prior to joining the Purdue faculty, he was an assistant/associate professor in the Civil Engineering Department at Louisiana State University from 1993-1997. Bullock's teaching, research and consulting interests are in the general area of Intelligent Transportation Systems (ITS). Over the past several years he has been actively involved in the hardware and software for the next generation of ITS traffic signal controllers. He is currently working on several sponsored projects involving real-time traffic signal systems. To learn more about Dr. Bullock, please see: http://cobweb.ecn.purdue.edu/~darcy/