You are here

Benjamin Coifman

  • Associate Professor, Electrical & Computer Engr.
  • Associate Professor, Civil, Envir & Geod Eng
  • 2070 Neil Avenue
    407 Hitchcock Hall
    Columbus, OH 43210
  • 614-292-4282

About

Education

PhD, 1998, University of California at Berkeley

Areas of interest

Intelligent transportation systems, application of advanced technologies to transportation (surveillance, control, communications).

Office

211 Caldwell Lab, ph: 614.292.4282 or 614.688.8324, fax: 614.292.7596
 

Honors

  • January, 2004

    Lumley Research Award.

  • January, 2004

    Lumley Interdisciplinary Research Award.

  • January, 2002

    NSF Career Award.

  • January, 2000

    Award for The Best ITS Research.

Chapters

2011

  • 2011. "Extended Bottlenecks, the Fundamental Relationship and Capacity Drop." In Proc. of The 19th International Symposium on Transportation and Traffic Theor,

2007

  • 2007. "Extracting traffic flow characteristics with an instrumented probe vehicle." In Proc. of Traffic and Granular Flow 2005,

2005

  • 2005. "Average Velocity of Waves Propagating Through Congested Freeway Traffic." In Proc. of The 16th International Symposium on Transportation and Traffic Theory,

Journal Articles

2019

  • Wu, M.; Coifman, B., 2019, "Quantifying what goes unseen in instrumented and autonomous vehicle perception sensor data – A case study." Transportation Research Part C: Emerging Technologies 107, 105-119 - 105-119.

2018

  • Douglass, J.; Dissanayake, D.; Coifman, B.; Chen, W. et al., 2018, "Measuring the effectiveness of a transit agency’s social media engagement with travelers." Transportation Research Record 2672, no. 50, 46-55 - 46-55.
  • Coifman, B.; Li, L.; Xiao, W., 2018, "Resurrecting the lost vehicle trajectories of treiterer and myers with new insights into a controversial hysteresis." Transportation Research Record 2672, no. 20, 25-38 - 25-38.

2017

  • Ponnu, B.; Coifman, B., 2017, "When adjacent lane dependencies dominate the uncongested regime of the fundamental relationship." Transportation Research Part B: Methodological 104, 602-615 - 602-615.
  • Coifman, B., Redmill, K., Yang, R., Mishalani, R.G., McCord, M.R., 2017, "Municipal Vehicles as Sensor Platforms to Monitor Roadway Traffic." Transportation Research Record . (In Press), . - ..
  • Coifman, B.; Li, L., 2017, "A critical evaluation of the Next Generation Simulation (NGSIM) vehicle trajectory dataset." Transportation Research Part B: Methodological 105, 362-377 - 362-377.
  • Kim, S.; Coifman, B., 2017, "Assessing the performance of SpeedInfo radar traffic sensors." Journal of Intelligent Transportation Systems: Technology, Planning, and Operations 21, no. 3, 179-189 - 179-189.

2016

  • Coifman, B.; Wu, M.; Redmill, K.; Thornton, D.A., 2016, "Collecting ambient vehicle trajectories from an instrumented probe vehicle: High quality data for microscopic traffic flow studies." Transportation Research Part C: Emerging Technologies 72, 254-271 - 254-271.
  • Coifman, B.; Jain, M., 2016, "Battery-saving communication modes for wireless freeway traffic sensors." Transportation Research Record 2593, 18-27 - 18-27.

2015

  • Thornton, D.; Coifman, B., 2015, "Signal progression impacts on transit buses as travel time probes." Journal of Transportation Engineering 141, no. 8,
  • Coifman, B., 2015, "Empirical flow-density and speed-spacing relationships: Evidence of vehicle length dependency." Transportation Research Part B: Methodological 78, 54-65 - 54-65.
  • Ponnu, B.; Coifman, B., 2015, "Speed-spacing dependency on relative speed from the adjacent lane: New insights for car following models." Transportation Research Part B: Methodological 82, 74-90 - 74-90.
  • Lee, H.; Coifman, B., 2015, "Using LIDAR to Validate the Performance of Vehicle Classification Stations." Journal of Intelligent Transportation Systems: Technology, Planning, and Operations 19, no. 4, 355-369 - 355-369.

2014

  • Coifman, B., 2014, "Revisiting the empirical fundamental relationship." Transportation Research Part B: Methodological 68, 173-184 - 173-184.
  • Wu, L.; Coifman, B., 2014, "Vehicle length measurement and length-based vehicle classification in congested freeway traffic." Transportation Research Record 2443, 1-11 - 1-11.
  • Coifman, B.; Neelisetty, S., 2014, "Improved speed estimation from single-loop detectors with high truck flow." Journal of Intelligent Transportation Systems: Technology, Planning, and Operations 18, no. 2, 138-148 - 138-148.
  • Kim, S.; Coifman, B., 2014, "Comparing INRIX speed data against concurrent loop detector stations over several months." TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES 49, 59-72 - 59-72.
  • Coifman, B., 2014, "Jam Occupancy and Other Lingering Problems with Empirical Fundamental Relationships." TRANSPORTATION RESEARCH RECORD no. 2422, 104-112 - 104-112.
  • Douglas A Thornton, Keith Redmill, and Benjamin Coifman,, 2014, "Automated Parking Surveys from a LIDAR Equipped Vehicle." Transportation Research C, 39, 23-35 - 23-35.
  • Wu, L.; Coifman, B., 2014, "Improved vehicle classification from dual-loop detectors in congested traffic." Transportation Research Part C: Emerging Technologies 46, 222-234 - 222-234.

2013

  • Kim, S.; Coifman, B., 2013, "Evaluation of axle-based and length-based vehicle classification stations." Transportation Research Record no. 2339, 1-12 - 1-12.
  • Kim, S.B.; Coifman, B., 2013, "Driver relaxation impacts on bottleneck activation, capacity, and the fundamental relationship." Transportation Research Part C: Emerging Technologies 36, 564-580 - 564-580.
  • Wei, H.; Liu, H.; Ai, Q.; Li, Z. et al., 2013, "Empirical innovation of computational dual-loop models for identifying vehicle classifications against varied traffic conditions." Computer-Aided Civil and Infrastructure Engineering 28, no. 8, 621-634 - 621-634.

2012

  • Lee, H.; Coifman, B., 2012, "Quantifying loop detector sensitivity and correcting detection problems on freeways." Journal of Transportation Engineering 138, no. 7, 871-881 - 871-881.
  • Xuan, Y.; Coifman, B., 2012, "Identifying lane-change maneuvers with probe vehicle data and an observed asymmetry in driver accommodation." Journal of Transportation Engineering 138, no. 8, 1051-1061 - 1051-1061.
  • Lee, H.; Coifman, B., 2012, "Side-fire lidar-based vehicle classification." Transportation Research Record no. 2308, 173-183 - 173-183.
  • Lee, H.; Coifman, B., 2012, "Identifying chronic splashover errors at freeway loop detectors." Transportation Research Part C: Emerging Technologies 24, 141-156 - 141-156.

2011

  • Lee, H.; Coifman, B., 2011, "Identifying and correcting pulse-breakup errors from freeway loop detectors." Transportation Research Record no. 2256, 68-78 - 68-78.

2009

  • Tong, D.; Merry, C.J.; Coifman, B., 2009, "New perspectives on the use of GPS and GIS to support a highway performance study." Transactions in GIS 13, no. 1, 69-85 - 69-85.
  • Coifman, B.; Kim, S., 2009, "Measuring freeway traffic conditions with transit vehicles." Transportation Research Record no. 2121, 90-101 - 90-101.
  • Coifman, B.; Kim, S.B., 2009, "Speed estimation and length based vehicle classification from freeway single-loop detectors." Transportation Research Part C: Emerging Technologies 17, no. 4, 349-364 - 349-364.

2008

  • Wang, C.; Coifman, B., 2008, "The effect of lane-change maneuvers on a simplified car-following theory." IEEE Transactions on Intelligent Transportation Systems 9, no. 3, 523-535 - 523-535.

2007

  • Coifman, B.; Krishnamurthy, S., 2007, "Vehicle reidentification and travel time measurement across freeway junctions using the existing detector infrastructure." Transportation Research Part C: Emerging Technologies 15, no. 3, 135-153 - 135-153.
  • Coifman, B.A.; Mallika, R., 2007, "Distributed surveillance on freeways emphasizing incident detection and verification." Transportation Research Part A: Policy and Practice 41, no. 8, 750-767 - 750-767.

2006

  • Coifman, B., 2006, "Vehicle level evaluation of loop detectors and the remote traffic microwave sensor." Journal of Transportation Engineering 132, no. 3, 213-226 - 213-226.
  • Coifman B., McCord, M.R., Mishalani, R.G., Iswal, M., Ji, Y., 2006, "Roadway Traffic Monitoring from an Unmanned Aerial Vehicle." IEE Proceedings Intelligent Transportation Systems (as of 2007 this journal continued to be published under the revised title IET Intelligent Transport Systems) 153, no. 1, 11-20 - 11-20.

2005

  • Jain, M.; Coifman, B., 2005, "Improved speed estimates from freeway traffic detectors." Journal of Transportation Engineering 131, no. 7, 483-495 - 483-495.

2004

  • Coifman, B.; Dhoorjaty, S., 2004, "Event data-based traffic detector validation tests." Journal of Transportation Engineering 130, no. 3, 313-321 - 313-321.

2003

  • Coifman, B., 2003, "Estimating density and lane inflow on a freeway segment." Transportation Research Part A: Policy and Practice 37, no. 8, 689-701 - 689-701.
  • Coifman, B., 2003, "Identifying the onset of congestion rapidly with existing traffic detectors." Transportation Research Part A: Policy and Practice 37, no. 3, 277-291 - 277-291.
  • Coifman, B.; Ergueta, E., 2003, "Improved vehicle reidentification and travel time measurement on congested freeways." Journal of Transportation Engineering 129, no. 5, 475-483 - 475-483.
  • Coifman, B.; Dhoorjaty, S.; Lee, Z.H., 2003, "Estimating median velocity instead of mean velocity at single loop detectors." Transportation Research Part C: Emerging Technologies 11, no. 3-4, 211-222 - 211-222.

2002

  • Coifman, B., 2002, "Estimating travel times and vehicle trajectories on freeways using dual loop detectors." Transportation Research Part A: Policy and Practice 36, no. 4, 351-364 - 351-364.
  • Coifman, B.; Cassidy, M., 2002, "Vehicle reidentification and travel time measurement on congested freeways." Transportation Research Part A: Policy and Practice 36, no. 10, 899-917 - 899-917.

2001

  • Coifman, B., 2001, "Improved velocity estimation using single loop detectors." Transportation Research Part A: Policy and Practice 35, no. 10, 863-880 - 863-880.

2000

  • Palen, J.; Coifman, B.A.; Sun, C.; Ritchie, S. et al., 2000, "Best Research Program: California Partners for Advanced Transit and Highways (PATH) Enhanced Loop-Based Traffic Surveillance Program." ITS Quarterly 8, no. 4,

1999

  • Coifman, B., 1999, "Using dual loop speed traps to identify detector errors." Transportation Research Record no. 1683, 47-58 - 47-58.

1998

  • Coifman, B.; Beymer, D.; McLauchlan, P.; Malik, J., 1998, "A real-time computer vision system for vehicle tracking and traffic surveillance." Transportation Research Part C: Emerging Technologies 6, no. 4, 271-288 - 271-288.

1997

  • Cassidy, M.J.; Coifman, B., 1997, "Relation among average speed, flow, and density and analogous relation between density and occupancy." Transportation Research Record no. 1591, 1-6 - 1-6.

1996

  • Chira-Chavala, T.; Coifman, B.; Porter, C.; Hansen, M., 1996, "Light rail accident involvement and severity." Transportation Research Record no. 1521, 147-155 - 147-155.
  • Chira-Chavala, T.; Coifman, B., 1996, "Effects of smart cards on transit operators." Transportation Research Record no. 1521, 84-90 - 84-90.
  • Coifman, B.A., 1996, "New methodology for smoothing freeway loop detector data: Introduction to digital filtering." Transportation Research Record no. 1554, 142-152 - 142-152.

1995

  • Coifman, B.A.; Hansen, M., 1995, "IVHS Warning System Can be Fit for Light Rail." IEEE Vehicular Technology Society News

Papers in Proceedings

2019

  • Coifman, B.A.; Li, L. "A Critical Evaluation of the Next Generation Simulation (NGSIM) Vehicle Trajectory Dataset- Abridged." in Proc. of the 98th Annual Meeting of the Transportation Research Board. (1 2019).
  • Zhang, J.; Xiao, W.; Coifman, B.; Mills, J.P. "Image-based vehicle tracking from roadside lidar data." (6 2019).

2018

  • Ponnu, B.; Coifman, B.A. "When Adjacent Lane Dependencies Dominate the Uncongested Regime of the Fundamental Relationship- Abridged." in Proc. of the 97th Annual Meeting of the Transportation Research Board. (1 2018).
  • Coifman, B.A.; Li, L.; Xiao, W. "Resurrecting the Lost Vehicle Trajectories of Treiterer and Myers- with New Insights into a Controversial Hysteresis." in Proc. of the 97th Annual Meeting of the Transportation Research Board. (1 2018).
  • Douglass, J.; Dissanayake, D.; Coifman, B.A.; Chen, W. et al. "Measuring the effectiveness of a transit agency's social-media engagement with travellers." in Proc. of the 97th Annual Meeting of the Transportation Research Board. (1 2018).

2017

  • Ponnu, B.; Coifman, B.A. "Speed-Spacing Dependency on Relative Speed from the Adjacent Lane: Presenting New Insights for Car Following Models." in Proc. of the 96th Annual Meeting of the Transportation Research Board. (1 2017).

2016

  • Coifman, B.A.; Jain, M. "Battery saving communication modes for wireless freeway traffic sensors." in Proc. of the 95th Annual Meeting of the Transportation Research Board. (1 2016).
  • Coifman, B.A. "An Overview of Empirical Flow-Density and Speed-Spacing Relationships: Evidence of Vehicle Length Dependency." in Proc. of the 95th Annual Meeting of the Transportation Research Board. (1 2016).
  • Kim, S.; Coifman, B.A. "Assessing the performance of SpeedInfo radar traffic sensors." in Proc. of the 95th Annual Meeting of the Transportation Research Board. (1 2016).

2015

  • Coifman, B.A. "An Overview of Revisiting the Empirical Fundamental Relationship." in Transportation Research Circular E-C197, Celebrating 50 Years of Traffic Flow Theory, A Symposium. (9 2015).

2014

  • Thornton, D.; Coifman, B.A. "Signal Progression Impacts on Transit Buses as Travel Time Probes." in Proc. of the 93rd Annual Meeting of the Transportation Research Board. (1 2014).
  • Wu, L.; Coifman, B.A. "Vehicle Length Measurement and Classification in Congested Freeway Traffic." in Proc. of the 93rd Annual Meeting of the Transportation Research Board. (1 2014).
  • Coifman, B.A. "Jam Occupancy and Other Lingering Problems with Empirical Fundamental Diagrams." in Proc. of the 93rd Annual Meeting of the Transportation Research Board. (1 2014).

2013

  • Kim, S.; Coifman, B.A. "Axle and Length Based Vehicle Classification Performance." in Proc. of the 92nd Annual Meeting of the Transportation Research Board. (1 2013).
  • Kim, S.; Coifman, B. "Freeway on-ramp bottleneck activation, capacity, and the fundamental relationship." in 20th International Symposium on Transportation and Traffic Theory (ISTTT). (1 2013).

2012

  • Lee, H.; Coifman, B.A. "Side-Fire LIDAR Based Vehicle Classification." in Proc. of the 91st Annual Meeting of the Transportation Research Board. (1 2012).
  • Liu, H.; Wei, H.; Ai, Q.; Li, Z. et al. "Clarifying traffic flow phases for vehicle classifications using dual-loop data." (12 2012).
  • Thornton, D.; Coifman, B.A.; Redmill, K. "Automating Parking Studies Using LIDAR Sensors- A Proof of Concept." in Proc. of the 91st Annual Meeting of the Transportation Research Board. (1 2012).

2011

  • Lee, H.; Coifman, B.A. "Quantifying Loop Detector Sensitivity and Correcting Detection Problems on Freeways." in Proc. of the 90th Annual Meeting of the Transportation Research Board. (1 2011).
  • Redmill, K.A., Coifman, B., McCord, M.R., Mishalani, R.G. "Using Transit or Municipal Vehicles as Moving Observer Platforms for Large Scale Collection of Traffic and Transportation System Information." in Proceedings of the 14th International IEEE Annual Conference on Intelligent Transportation Systems. (10 2011).
  • Redmill,Keith,A; Coifman,Benjamin; McCord,Mark; Mishalani,Rabi,G "Using Transit or Municipal Vehicles as Moving Observer Platforms for Large Scale Collection of Traffic and Transportation System Information." in 14th International IEEE Conference on Intelligent Transportation Systems (ITSC). (1 2011).
  • Wei, H.; Qingyi, A.; Deogratias, E.; Coifman, B.A. "Length-Based Vehicle Classification Models Using Dual- Loop Data Against Stop-and-Go Traffic Flow." in Proc. of the 90th Annual Meeting of the Transportation Research Board. (1 2011).
  • Xuan, Y.; Coifman, B.A. "Lane-Change Maneuver Detection with Differential Global Positioning System Data from Probe Vehicle." in Transportation Research Circular E-C149, 75 Years of the Fundamental Diagram for Traffic Flow Theory, Greenshields Symposium. (6 2011).
  • Coifman, B.; Kim, S. "Extended bottlenecks, the fundamental relationship, and capacity drop on freeways." (1 2011).
  • Coifman, B.; Kim, S. "Extended bottlenecks, the fundamental relationship, and capacity drop on freeways." (11 2011).

2010

  • Lee, H.; Coifman, B.A. "An Algorithm to Identify Splashover Errors at Freeway Loop Detectors." in Proc. of the 89th Annual Meeting of the Transportation Research Board. (1 2010).

2007

  • Wang, C.; Coifman, B.A. "Estimating the Number of Lane Change Maneuvers on Congested Freeway Segments." in Proc. of the 11th World Conference on Transport Research. (1 2007).
  • Coifman, B.; Lee, H. "Analytical tools for loop detectors and traffic monitoring systems." (12 2007).
  • Coifman, B.; Lee, H. "Analytical tools for loop detectors and traffic monitoring systems." in 10th International IEEE Conference on Intelligent Transportation Systems. (1 2007).
  • Gao, B.; Coifman, B. "A vehicle detection and tracking approach using probe vehicle LIDAR data." in 6th International Conference on Traffic and Granular Flow. (1 2007).

2006

  • Gao, B.; Coifman, B. "Vehicle identification and GPS error detection from a LIDAR equipped probe vehicle." (12 2006).
  • Tong, D.; Merry, C.; Coifman, B.A. "Traffic information deriving using GPS probe vehicle data integrated with GIS." in Proc. of the 2006 GIS-T Symposium. (1 2006).
  • Lang, L.; Coifman, B. "Identifying lane-mapping errors at freeway detector stations." (1 2006).
  • Coifman, B.; Lee, H. "A single loop detector diagnostic: Mode on-time test." (12 2006).
  • Coifman, B.; Kim, S. "Using transit vehicles to measure freeway traffic conditions." (12 2006).
  • Coifman, B., McCord, M.R., Mishalani, R.G., Ji, Y., Iswalt, M.V. "Traffic Flow Data Extracted from Imagery Collected using a Micro Unmanned Aerial Vehicle." in Proceedings of the 9th International Conference on Applications of Advanced Technologies in Transportation, ASCE, Chicago, IL, USA. (8 2006).
  • Coifman, B.; Mishalani, R.; Wang, C.; Krishnamurthy, S. "Impact of lane-change maneuvers on congested freeway segment delays pilot study." (1 2006).
  • Xuan, Y.; Coifman, B. "Lane change maneuver detection from probe vehicle DGPS data." (12 2006).
  • McCord, M.R., Mishalani, R.G., Coifman, B., Ji, Y., Iswalt, M.V. "Determining Origin Destination Flows across a Two-intersection Network from Non overlapping UAV and Ground-based Imagery." in Proceedings of the 9th International Conference on Applications of Advanced Technologies in Transportation, Chicago, IL, USA. (8 2006).
  • Keith Redmill and Benjamin Coifman "System Management and Monitoring - Temporal Evaluation of Freeway Management Systems." (9 2006).

2005

  • Coifman, B. "Freeway detector assessment: Aggregate data from remote traffic microwave sensor." (1 2005).
  • Wang, C.; Coifman, B. "Verification of a simplified car-following theory using vehicle trajectory data." (12 2005).
  • Wang, C.; Coifman, B. "The study on the effect of lane change maneuvers on a simplified car-following theory." (12 2005).
  • Coifman, B.; Krishnamurthy, S.; Wang, X. "Lane-change maneuvers consuming freeway capacity." (1 2005).
  • Coifman, B.A. "Vehicle Level Evaluation of Loop Detectors and the Remote Traffic Microwave Sensor (RTMS)." in 84th Annual Meeting of the Transportation Research Board. (1 2005).

2004

  • Coifman, B.; Mallika, R. "Distributed surveillance on freeways with an emphasis on incident detection." (12 2004).
  • Coifman, B.; Yang, Y. "Estimating spatial measures of roadway network usage from remotely sensed data." (1 2004).
  • Krishnamurthy, S.; Coifman, B. "Measuring freeway travel times using existing detector infrastructure." (12 2004).
  • Neelisetty, S.; Coifman, B.A. "Improved Single Loop Velocity Estimation in the Presence of Heavy Truck Traffic." in 83rd Annual Meeting of the Transportation Research Board,. (1 2004).
  • Coifman, B.A.; McCord, M.; Mishalani, M.; Redmill, K. "Surface Transportation Surveillance from Unmanned Aerial Vehicles." in 83rd Annual Meeting of the Transportation Research Board. (1 2004).
  • Wang, Y.; Foster, D.; Coifman, B. "Measuring wave velocities on highways during congestion using cross spectral analysis." (12 2004).

2003

  • Coifman, B. "Estimating density and number of lane change maneuvers on a freeway." (1 2003).
  • McCord, M.R.; Yang, Y.; Jiang, Z.; Coifman, B. et al. "Estimating Annual Average Daily Traffic from Satellite Imagery and Air Photos Empirical Results." (12 2003).

2002

  • Coifman, B.A.; Dhoorjaty, S. "Event Data Based Traffic Detector Validation Tests." in 81st Annual Meeting of the Transportation Research Board. (1 2002).
  • McCord, M.; Goel, P.; Jiang, Z.; Coifman, B.A. et al. "Improving AADT and VDT Estimation with High-Resolution Satellite Imagery." in Integrating Remote Sensing at the Global, Regional and Local Scale. Pecora 15/Land Satellite Information IV Conference. (1 2002).
  • Coifman, B.A.; Ergueta, E. "Improved Vehicle Reidentification and Travel Time Measurement on Congested Freeways." in Proc. 81st Annual Meeting of the Transportation Research Board. (1 2002).
  • Mishalani, R.G.; Coifman, B.; Gopalakrishna, D. "Evaluating real-time origin-destination flow estimation using remote sensing-based surveillance data." (1 2002).
  • Coifman, B.; Banerjee, B. "Vehicle reidentification and travel time measurement on freeways using single loop detectors-from free flow through the onset of congestion." (1 2002).

2001

  • Coifman, B. "Vehicle reidentification and travel time measurement, Part II: Uncongested freeways and the onset of congestion." (1 2001).
  • Jia, Z.; Chen, C.; Coifman, B.; Varaiya, P. "The PeMS algorithms for accurate, real-time estimates of g-factors and speeds from single-loop detectors." (1 2001).
  • Coifman, B.; Cassidy, M. "Vehicle reidentification and travel time measurement, Part I: Congested freeways." (1 2001).
  • Coifman, B.A.; Lee, Z. "Estimating Median Velocity Instead of Mean Velocity at Single Loop Detectors." in Proc. 80th Annual Meeting of the Transportation Research Board. (1 2001).
  • Coifman, B.A. "Identifying the Onset of Congestion Rapidly with Existing Traffic Detectors." in Proc. 80th Annual Meeting of the Transportation Research Board. (1 2001).

2000

  • Coifman, B.; Lyddy, D.; Skabardonis, A. "Berkeley Highway Laboratory - building on the I-880 Field Experiment." (1 2000).
  • Kwon, J.; Coifman, B.; Bickel, P. "Day-to-day travel-time trends and travel-time prediction from loop-detector data." (1 2000).
  • Coifman, B.A. "Improved Velocity Estimation Using Single Loop Detectors." in Proc. 79th Annual Meeting of the Transportation Research Board. (1 2000).

1999

  • Coifman, B.A.; Beymer, D.; McLauchlan, P.; Malik, J. "A Real-Time Computer Vision System for Vehicle Tracking and Traffic Surveillance." in Proc. 78th Annual Meeting of the Transportation Research Board. (1 1999).
  • Coifman, B.A. "Using Dual Loop Speed Traps to Identify Detector Errors." in Proc. 78th Annual Meeting of the Transportation Research Board. (1 1999).

1998

  • Coifman, B. "Vehicle re-identification and travel time measurement in real-time on freeways using existing loop detector infrastructure." (1 1998).
  • Coifman, B. "New algorithm for vehicle reidentification and travel time measurement on freeways." (1 1998).

1997

  • Cassidy, M.; Coifman, B.A. "The Relation Between Average Speed, Flow and Occupancy and the Analogous Relation Between Density and Occupancy." in Proc. 76th Annual Meeting of the Transportation Research Board. (1 1997).
  • Beymer, D.; McLauchlan, P.; Coifman, B.; Malik, J. "Real-time computer vision system for measuring traffic parameters." (1 1997).

1996

  • Coifman, B.A. "A New Methodology for Smoothing Freeway Loop Detector Data: an Introduction to Digital Filtering." in Proc. 75th Annual Meeting of the Transportation Research Board. (1 1996).
  • Chira-Chavala, T.; Coifman, B.A. "Effects of Smart Cards on Transit Operators." in 75th Annual Meeting of the Transportation Research Board. (1 1996).
  • Chira-Chavala, T.; Coifman, B.A.; Porter, C.; Hansen, M. "Light rail accident involvement and security." in 75th Annual Meeting of the Transportation Research Board. (1 1996).

1995

  • Coifman, B. "IVHS protection at light rail grade crossings." (1 1995).