Christopher Day

Title(s):

Office

Information

• Applications of novel data sets (such as vehicle telematics) in traffic control, transportation operations, and data-driven performance measures and analytics
• Documenting and improving the state of the practice in transportation operations
• Enhancing adaptive control of hierarchical and decentralized traffic control systems with the integration of new data sources and analytical techniques at different time scales
• Incorporating new data sources and associated methodological and analytical concepts into transportation education

Education

Interest Areas

Publications

Peer-Reviewed Journal Articles

Iowa State University – Associate Professor (2023-present)

69. Okaidjah, D.O. and C.M. Day. “Traffic Flow Characteristics in Work Zone and Non Work Zone Environment and its Impact on Road Crashes at the Segment Level.” Journal of Transportation Technologies 13, 615-631 (2023). https://doi.org/10.4236/jtts.2023.134027 

68. Mahmud, S. and C.M. Day. “Evaluation of Arterial Signal Coordination with Commercial Connected Vehicle Data: Empirical Traffic Flow Visualization and Performance Measurement.” Journal of Transportation Technologies, 13, 327-352 (2023). https://doi.org/10.4236/jtts.2023.133016 

67. Mahmud, S. and C.M. Day. “Exploring Crowdsourced Hard-Acceleration and Braking Event Data for Evaluating Safety Performance of Low-Volume Rural Highways in Iowa.” Journal of Transportation Technologies, 13, 282-300 (2023).  https://doi.org/10.4236/jtts.2023.132014 

Iowa State University – Assistant Professor (2017-2023)

66. Shams, A., S. Mahmud, and C.M. Day. “Comparison of Flow- and Bandwidth-Based Methods of Traffic Signal Offset Optimization.” Journal of Transportation Engineering, Part A: Systems, 149(5), 04023033 (2023). https://doi.org/10.1061/JTEPBS.TEENG-7404 

65. Okaidjah, D., M. Haddad, C.M. Day, and B. Das. “Spatial Analysis of the Relationship between Intersection Crashes and the Urban Built Environment: A Case Study of Des Moines.” Transportation Research Record, 2677(2), 803-817 (2023). https://doi.org/10.1177/03611981221108392 

64. Shams, A. and C.M. Day. “Advanced Gap Seeking Logic for Actuated Signal Control using Vehicle Trajectory Data: Proof of Concept.” Transportation Research Record, 2677(2), 610-623 (2023). https://doi.org/10.1177/03611981221108147 

63. Emtenan, A.M.T. and C.M. Day. “Correlation Analysis for Exploring the Relationship between Probe Vehicle Data and Event-based Traffic Signal Performance Measures.” Transportation Research Record, 2676(8), 587-600 (2022). https://doi.org/10.1177/03611981221084684 

62. Emtenan, A.M.T., A. Haghighat, M. Shields, J. Shaw, P. Hawley, A. Sharma, and C.M. Day. “Exploratory Regression Models for Estimating Right-Turn-on-Red Volume on Exclusive Right-Turn Lanes at Signalized Intersections.” Transportation Research Record, 2677(3), 596-608 (2022). https://doi.org/10.1177/03611981221116370 

61. Yang Y, A Shams, and CM Day. “Application of Pareto Front to Evaluate Adaptive Traffic Signal Timing for Multiple Objectives.” Journal of Modern Mobility Systems, 2, 108-113 (2021). https://doi.org/10.13021/jmms.2021.3172

60. Singleton PA, M Taylor, C Day, S Poddar, S Kothuri, and A Sharma. “Impact of COVID-19 on Traffic Signal Systems: A Survey of Agency Interventions and Observed Changes in Pedestrian Activity.” Transportation Research Record, in press (2021). https://doi.org/10.1177/03611981211026303 

59. Emtenan AMT and CM Day. “Impact of Turning Lane Storage Length and Turning Proportions on Throughput at Oversaturated Signalized Intersections.” Transportation Research Record, 2675(11), 305-319 (2021). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 11, 2021. https://doi.org/10.1177/03611981211017139 

58. Chawla H, MU Megat-Johari, PT Savolainen, and CM Day. “Evaluation of Strategies to Mitigate Culvert-Involved Crashes.” Transportation Research Record, 2675(5), 403-417 (2020). https://doi.org/10.1177/0361198121992070 

57. Emtenan AMT and CM Day. “Impacts of Detector Configuration on Performance Measurement and Signal Operations.” Transportation Research Record, 2674(4), 300-313 (2020). https://doi.org/10.1177/0361198120912244 

56. Day CM and AMT Emtenan. “Trajektorienbasierte Leistungskennzahlen für Anlagen mit gestörtem Verkehrsfluss.” (“Trajectory-Based Performance Measures for Interrupted-Flow Facilities”). Straßenverkehrstechnik 63(9), 647-653 (2019).

55. Day CM and DM Bullock. “Optimization of traffic signal offsets with high-resolution event data.” Journal of Transportation Engineering, Part A: Systems, 146(3), 04019076 (2019). https://doi.org/10.1061/JTEPBS.0000309 

54. Day CM and AMT Emtenan. “Impact of phase sequence on cycle length resonance.” Transportation Research Record, 2673(11), 398-408 (2019). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 14, 2019.

53. Brennan TM, CM Day, and M Volovski. “Ranking statistically similar highway travel corridors using speed data sets.” Infrastructure Asset Management, 5(3), 96-104 (2018). https://doi.org/10.1680/jinam.17.00016 

52. Day CM, H Li, JR Sturdevant, and DM Bullock. “Data-driven ranking of coordinated traffic signal systems for maintenance and retiming.” Transportation Research Record, 2672(18), 167-178 (2018). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 8, 2018. https://doi.org/10.1177/0361198118794042 

51. Remias SM, CM Day, J Waddell, J Kirsch, and T Trepanier. “Evaluating the performance of coordinated signal timing: a comparison of common data types with connected vehicle data.” Transportation Research Record, 2672(18), 128-142 (2018). https://doi.org/10.1177/0361198118794546

Purdue University – Senior Research Scientist (2011-2017)

50. Day CM, H Li, L Richardson, J Howard, T Platte, and DM Bullock. “Detector-free optimization of traffic signal offset with connected vehicle data.” Transportation Research Record No. 2620, 54-68 (2017). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 9, 2017. https://doi.org/10.3141/2620-06 

49. Day CM and DM Bullock. “Investigation of self-organizing traffic signal control with graphical signal performance measures.” Transportation Research Record No. 2620, 69-82 (2017). https://doi.org/10.3141/2620-07 

48. Li H, LM Richardson, CM Day, J Howard, and DM Bullock. “Scalable dashboard for identifying split failures and heuristic for reallocating split times.” Transportation Research Record No. 2620, 83-95 (2017). https://doi.org/10.3141/2620-08 

47. Richardson LM, MD Luker, CM Day, M Taylor, and DM Bullock. “Outcome assessment of peer-to-peer adaptive control adjacent to a national park.” Transportation Research Record No. 2620, 43-53 (2017). https://doi.org/10.3141/2620-05 

46. Young SE, E Sharifi, CM Day, and DM Bullock. “Visualizations of Travel Time Performance based on Vehicle Re-Identification Data.” Transportation Research Record No. 2646, 84-92 (2017). https://doi.org/10.3141/2646-10 

45. Day CM and DM Bullock. “Cycle length strategies for a diverging diamond interchange in a signalized arterial.” Journal of Transportation Engineering, 142, 04016067 (2016). https://doi.org/10.1061/(ASCE)TE.1943-5436.0000897 

44. Day CM and DM Bullock. “Opportunities for detector-free signal optimization with limited connected vehicle market penetration: a proof-of-concept study.” Transportation Research Record No. 2558, 54-65 (2016). https://doi.org/10.3141/2558-06 

43. Lavrenz SM, C Day, J Grossman, R Freije, and DM Bullock. “Use of high-resolution signal controller data to identify red light running.” Transportation Research Record No. 2558, 41-53 (2016). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 11, 2016. https://doi.org/10.3141/2558-05

42. Lavrenz SM, CM Day, WB Smith, JR Sturdevant, and DM Bullock. “Assessing longitudinal arterial performance traffic signal retiming outcomes.” Transportation Research Record No. 2558, 66-77 (2016). https://doi.org/10.3141/2558-07 

41. Li H, SM Remias, CM Day, MM Mekker, JR Sturdevant, and DM Bullock. “Shock wave boundary detection using cloud-based probe data.” Transportation Research Record No. 2526, 51-60 (2015). https://doi.org/10.3141/2526-06 

40. Day CM, SM Remias, H Li, MM Mekker, ML McNamara, ED Cox, and DM Bullock. “Performance ranking of arterial corridors using travel time and travel time reliability metrics.” Transportation Research Record No. 2487, 44-54 (2015). https://doi.org/10.3141/2487-04 

39. Hainen AM, H Li, AL Stevens, CM Day, JR Sturdevant, and DM Bullock. “Sequence optimization at signalized diamond interchanges using high-resolution event-based data.” Transportation Research Record No. 2487, 5-30 (2015). https://doi.org/10.3141/2487-02 

38. Hainen AM, AL Stevens, CM Day, H Li, J Mackey, M Luker, M Taylor, JR Sturdevant, and DM Bullock. “Performance measures for optimizing diverging diamond interchanges and outcome assessment with drone video.” Transportation Research Record No. 2487, 31-43 (2015). https://doi.org/10.3141/2487-03 

37. Li H, SM Lavrenz, CM Day, A Stevens, JR Sturdevant, and DM Bullock. “Use of both travel time and travel time reliability measures to quantify benefits of signal timing maintenance and optimization.” Transportation Research Record No. 2487, 55-68 (2015). https://doi.org/10.3141/2487-05 

36. Lavrenz SM, CM Day, AM Hainen, WB Smith, AL Stevens, H Li, and DM Bullock. “Use of maximum vehicle delay to characterize signalized intersection performance.” Transportation Research Record No. 2488, 41-52 (2015). https://doi.org/10.3141/2488-05 

35. Day, CM and DM Bullock. “Design guidelines and conditions that warrant deploying fully actuated coordination.” Transportation Research Record No. 2439, 1-11 (2014). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 13, 2014. https://doi.org/10.3141/2439-01

34. Hainen AM, A Stevens, CM Day, JR Sturdevant, and DM Bullock. “High-resolution event-based data at diamond interchanges: performance measures and optimization of ring displacement.” Transportation Research Record No. 2439, 12-26, (2014). https://doi.org/10.3141/2439-02 

33. Freije R, AM Hainen, A Stevens, H Li, WB Smith, CM Day, JR Sturdevant, and DM Bullock. “Graphical performance measures for practitioners to triage split failure trouble calls.” Transportation Research Record No. 2439, 27-40, (2014). https://doi.org/10.3141/2439-03 

32. Lavrenz S, AM Hainen, A Stevens, CM Day, H Li, R Freije, WB Smith, H Summers, JR Sturdevant, and DM Bullock. “Improving intersection behavior through delay-based left turn phase initiation.” Transportation Research Record No. 2439, 41-52 (2014). https://doi.org/10.3141/2439-04 

31. Remias SM, TM Brennan, CM Day, H Summers, DK Horton, ED Cox, and DM Bullock. “Spatially referenced probe data performance measures for infrastructure investment decision makers.” Transportation Research Record No. 2420, 33-44, (2014). https://doi.org/10.3141/2420-04 

30. Day CM, JR Sturdevant, H Li, AM Hainen, SM Remias, and DM Bullock. “Revisiting the cycle length-lost time question with critical lane analysis.” Transportation Research Record No. 2355, 1-9 (2013). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 14, 2013. https://doi.org/10.3141/2355-01 

29. Li H, AM Hainen, CM Day, G Grimmer, JR Sturdevant, and DM Bullock. “Longitudinal performance measures for assessing agency-wide signal management objectives.” Transportation Research Record No. 2355, 20-30 (2013). https://doi.org/10.3141/2355-03 

28. Remias SM, AM Hainen, CM Day, TM Brennan, H Li, EM Rivera-Hernandez, JR Sturdevant, SE Young, and DM Bullock. “Performance characterization of arterial traffic flow with probe vehicle data.” Transportation Research Record No. 2380, 10-21 (2013). https://doi.org/10.3141/2380-02 

27. Hainen AM, EM Rivera, CM Day, M McBride, G Grimmer, A Loehr, and DM Bullock. “Roundabout critical headway measurement based on hi-resolution event-based data from wireless magnetometers.” Transportation Research Record No. 2389, 51-64 (2013). https://doi.org/10.3141/2389-06 

26. Day CM, JM Ernst, TM Brennan, CS Chou, AM Hainen, SM Remias, AP Nichols, BD Griggs, and DM Bullock. “Performance measures for adaptive signal control: Case study of system-in-the-loop simulation.” Transportation Research Record No. 2311, 1-15, (2012). https://doi.org/10.3141/2311-01 

25. Day CM, and DM Bullock. “Characterization of platoon dispersion model with high-resolution signal event data.” Transportation Research Record No. 2311, 16-28 (2012). https://doi.org/10.3141/2311-02 

24. Brennan TM, BD Griggs, G Grimmer, AM Hainen, CM Day, JR Sturdevant, and DM Bullock. “Defining design space for parameters of traffic signal timing: Empirical approach.” Transportation Research Record No. 2311, 85-98, (2012). https://doi.org/10.3141/2311-08 

23. Ernst JM, CM Day, JV Krogmeier, and DM Bullock. “Probe data sampling guidelines for characterizing arterial travel time.” Transportation Research Record No. 2315, 173-181 (2012). https://doi.org/10.3141/2315-18 

Purdue University – Postdoctoral Researcher and Graduate Research Assistant (2006-2010)

22. Day CM, TM Brennan, AM Hainen, SM Remias, H Premachandra, JR Sturdevant, G Richards, JS Wasson, and DM Bullock. “Reliability, flexibility, and environmental impact of alternative objective functions for arterial offset optimization.” Transportation Research Record No. 2259, 8-22 (2011). https://doi.org/10.3141/2259-02 

21. Day CM, TM Brennan, H Premachandra, JR Sturdevant, and DM Bullock. “Analysis of peer data on intersections for decisions about coordination of arterial traffic signal.” Transportation Research Record No. 2259, 23-36, (2011). https://doi.org/10.3141/2259-03 

20. Day CM and DM Bullock. “Computational efficiency of alternative algorithms for arterial offset optimization.” Transportation Research Record No. 2259, 37-47 (2011). https://doi.org/10.3141/2259-04 

19. Brennan TM, CM Day, JR Sturdevant, and DM Bullock. “Visual education tools to illustrate coordinated system operation.” Transportation Research Record No. 2259, 59-72, (2011). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 24, 2011. https://doi.org/10.3141/2259-06 

18. Smaglik EJ, D Gettman, DM Bullock, CM Day, and H Premachandra. “Comparison of alternative real-time performance measures for measuring signal phase utilization and identifying oversaturation.” Transportation Research Record No. 2259, 123-131, (2011). https://doi.org/10.3141/2259-11 

17. Brennan TM, CM Day, JS Wasson, JR Sturdevant, and D.M. Bullock. “Assessing signal timing plans for winter conditions.” Journal of Transportation of the Institute of Transportation Engineers 1, 59-76 (2011). https://trid.trb.org/view/1105658 

16. Brennan TM, JM Ernst, CM Day, DM Bullock, JV Krogmeier, and M Martchouk. “Influence of vertical sensor placement on data collection efficiency from Bluetooth MAC address collection devices.” Journal of Transportation Engineering 136, 1104-1109 (2010). https://doi.org/10.1061/(ASCE)TE.1943-5436.0000178 

15. Day CM, H Premachandra, TM Brennan, JR Sturdevant, and DM Bullock. “Operational evaluation of wireless magnetometer vehicle detectors at a signalized intersection.” Transportation Research Record No. 2192, 11-23 (2010). https://doi.org/10.3141/2192-02 

14. Day CM, JR Sturdevant, and DM Bullock. “Outcome oriented performance measures for management of signalized arterial capacity.” Transportation Research Record No. 2192, 24-36 (2010). https://doi.org/10.3141/2192-03 

13. Day CM, R Haseman, H Premachandra, TM Brennan, JS Wasson, JR Sturdevant, and DM Bullock. “Evaluation of arterial signal coordination: methodologies for visualizing high-resolution event data and measuring travel time.” Transportation Research Record No. 2192, 37-49 (2010). https://doi.org/10.3141/2192-04 

12. Brennan TM, CM Day, JR Sturdevant, E Raamot, and DM Bullock. “Track clearance performance measures for railroad preempted intersections.” Transportation Research Record No. 2192, 64-76 (2010). Received Exceptional Paper Award, Traffic Signal Systems Committee, Transportation Research Board, January 12, 2010. https://doi.org/10.3141/2192-06 

11. Brennan TM, EA Hulme, CM Day, JR Sturdevant, T Overman, J Kruger, and DM Bullock. “Decision-tree model to prioritize signalized intersections near highway-railroad crossings for railroad interconnect.” Transportation Research Record No. 2192, 116-126 (2010). https://doi.org/10.3141/2192-11 

10. Day CM, DM Bullock, and JR Sturdevant. “Cycle-length performance measures: revisiting and extending fundamentals.” Transportation Research Record No. 2128, 48-57 (2009). https://doi.org/10.3141/2128-05 

9. Day CM, TM Brennan, ML Harding, H Premachandra, A Jacobs, DM Bullock, JV Krogmeier, and JR Sturdevant. “Three dimensional mapping of inductive loop detector sensitivity using field measurement.” Transportation Research Record No. 2128, 35-47, (2009). https://doi.org/10.3141/2128-04 

8. Brennan TM, CM Day, DM Bullock, and JR Sturdevant. “Performance measures for railroad preempted intersections.” Transportation Research Record No. 2128, 20-34 (2009). https://doi.org/10.3141/2128-03 

7. Hubbard SML, DM Bullock, and CM Day. “Integration of real-time pedestrian performance measures into existing traffic signal system infrastructure.” Transportation Research Record No. 2080, 37-47 (2008). https://doi.org/10.3141/2080-05 

6. Day CM, EJ Smaglik, DM Bullock, and JR Sturdevant. “Quantitative evaluation of fully actuated versus non-actuated coordinated phases.” Transportation Research Record No. 2080, 8-21 (2008). https://doi.org/10.3141/2080-02 

Ball State University – Graduate Research Assistant (2004-2006)

5. Jin F, Y Liu, CM Day, and SA Little. “Enhanced electron emission from functionalized carbon nanotubes with a barium strontium oxide coating produced by magnetron sputtering.” Carbon, 45(3), 587-593 (2007). https://doi.org/10.1016/j.carbon.2006.10.014 

4. Jin F, Y Liu, CM Day, and SA Little. “Enhanced field emission from carbon nanotubes with a thin layer of low work function barium strontium oxide surface coating.” Journal of Vacuum Science and Technology Part B, 25(6), 1785-1788 (2007). https://doi.org/10.1116/1.2790914 

3. Jin F, Y Liu, and CM Day. “Barium strontium oxide coated carbon nanotubes as field emitters.” Applied Physics Letters, 90, 143114 (2007). https://doi.org/10.1063/1.2719645 

2. Liu Y, CM Day, SA Little, and F Jin. “Thin film deposition of barium strontium oxide by RF magnetron sputtering.” Journal of Vacuum Science and Technology Part A, 24, 2187-2191 (2006). https://doi.org/10.1116/1.2363400 

1. Jin F, Y Liu, and CM Day. “Thermionic emission from carbon nanotubes with a thin layer of low work function barium strontium oxide surface coating.” Applied Physics Letters, 88, 163116 (2006). https://doi.org/10.1063/1.2198093 

Peer-Reviewed Conference Proceedings

Iowa State University – Associate Professor (2023-present)

50. Shams, A., N. Dobrota, B. Cesme, and C.M. Day. “Integration of Real-Time Vehicle Trajectories into Actuated Traffic Signals to Improve Local Intersection and Arterial Control.” Transportation Research Board Annual Meeting, Washington, DC (2024).

49. Chattopadhyay, S., H.-J. Yang, I.F. Shihab, C.M. Day, D. Hurwitz, S. Sarkar, and A. Sharma. “Exploring Current Capabilities of Large Language Models for Use as Signal Timing Virtual Assistants.” Transportation Research Board Annual Meeting, Washington, DC (2024).

48. Emtenan, A.M.T., C.M. Day, A. Sharma, J. Shaw, P. Hawley, M. Shields, and A. Haghighat. “Improved Right-Turn-on-Red Volume Estimation Models for Analysis of Signalized Intersection.” Transportation Research Board Annual Meeting, Washington, DC (2024).

47. Mahmud, S., T. Huang, A. Sharma, and C.M. Day. “Use of Connected Vehicle Data to Identify Signal Timing Plans on Signalized Arterial Corridors.” IEEE International Automated Vehicle Validation Conference, Austin, Texas (2023).

46. Shams, A., C.M. Day, and S. Mahmud. “Digital Twin of Physical Intersection to Trajectory-based Traffic Signal Controller.” IEEE International Automated Vehicle Validation Conference, Austin, Texas (2023).

45. Mahmud, S., M. Carydis, A. Shams, and C.M. Day. “Calibration of Robertson’s Platoon Dispersion Model with Connected Vehicle Data.” IEEE Intelligent Transportation Systems Conference, Bilbao, Spain (2023).

44. Okaidjah, D. and C.M. Day. “Use of Connected Vehicle Data to Explore the Influence of Dynamic Message Sign Displays of the Number of Road Fatalities on Adjacent Freeway Segment Vehicle Speeds.” IEEE Intelligent Transportation Systems Conference, Bilbao, Spain (2023).

Iowa State University – Assistant Professor (2017-2023)

43. Okaidjah, D.O. and C.M. Day. “Influence of Travel Time Performance Measures on Road Crashes at the Segment Level.” Paper No. 23-4499, Transportation Research Board Annual Meeting, Washington, DC (2023).

42. Mahmud, S. and C.M. Day. “Evaluation of Arterial Signal Coordination with Commercial Connected Vehicle Data: Empirical Traffic Flow Visualizations and Performance Measures Considering Multiple Origin-Destination Paths.” Paper No. 23-5161, Transportation Research Board Annual Meeting, Washington, DC (2023).

41. Young, S.E., E.A. Bensen, L. Zhu, C. Day, J.S. Lott, R. Sandhu, C. Tripp, and P. Graf. “Concept of Operations of Next-Generation Traffic Control Utilizing Infrastructure-Based Cooperative Perception.” Proceedings, ASCE International Conference on Transportation and Development, Seattle, WA (2022).

40. Mahmud, S. and C.M. Day. “Machine Learning Assisted Data Fusion for Identifying Recurring Congestion and Determining Causes of Non-Recurring Congestion.” Paper No. 22-04772, Transportation Research Board Annual Meeting, Washington, DC (2022).

39. Khalilzadeh Z, D Okaidjah, and CM Day. “Impacts of Phase Assignment on the Operational Performance of Traffic Signals.” Paper No. 21-04225, Transportation Research Board Annual Meeting, Washington, DC (2021).

38. Shams A and CM Day. “Impact of Sensing Range on Real-Time Adaptive Control of Signalized Intersections Using Vehicle Trajectory Information.” Paper No. 21-03373, Transportation Research Board Annual Meeting, Washington, DC (2021).

37. Day CM and MTA Niloy. “Influence of Data Aggregation Processes on the Estimation of Travel Time Distributions from Probe Vehicle Data for Assessing Travel Time Reliability.” Paper No. 21-02301, Transportation Research Board Annual Meeting, Washington, DC (2021).

36. Poddar, S, A Sharma, C Day, and B Guy. “Before-After Study of Signal Timing Improvement Using Crowd-Sourced Data: A Case Study of Omaha.” ASCE International Conference on Transportation and Development 2020, pp. 270-279 (2020).

35. Thompson KR, S Mahmud, MTA Niloy, and CM Day. “Probe Vehicle Performance Measures for Assessing Travel Time Reliability.” Transportation Research Board Annual Meeting, Washington, DC (2020).

34. Day CM, R Helt, D Sines and AMT Emtenan. “Leveraging Sensor-Based Vehicle Trajectory Construction in Existing Traffic Signal Infrastructure.” IEEE Intelligent Transportation Systems Conference, Auckland, New Zealand (2019).

33. Zhu L, SE Young, and CM Day. “Exploring First-Order Approximation of Energy Equivalence of Safety at Intersections.” ASCE TD&I Annual Meeting (2019).

32. Day, CM. “Sensitivity of Automated Intersection Control to Frequency of Pedestrian Calls.” Automated Vehicle Symposium, San Francisco, CA (2018).

31. Day, CM. “Platoon dispersion and saturation flow rates in cellular automata models of signal-controlled roadway traffic.” IEEE Intelligent Transportation Systems Conference, Lahaina, HI (2018).

30. Day, CM, H Li, SM Lavrenz, SM Remias, and DM Bullock. “Enhanced dynamic travel time estimation from probe vehicle segment speeds.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 18-00114 (2018).

29. Mathew JK, CM Day, H Li, and DM Bullock. “Curating automatic vehicle location data to compare the performance of outlier filtering methods.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 18-01536 (2018).

28. Mathew J, D Krohn, H Li, CM Day, A Patel, D Farley, and DM Bullock. “Outcome assessment using connected vehicle data to justify signal investments to decision makers.” ITS World Congress, Montreal, Canada (2017).

Purdue University – Senior Research Scientist (2011-2017)

27. Day CM, H Li, SML Hubbard, and DM Bullock. “Observations of trip generation, route choice, and trip chaining with private-sector probe vehicle GPS data.” Mobil.TUM, Munich, Germany (2017).

26. Day CM and DM Bullock. “Visualization of the potential performance of coordinated systems to support management of signal timing.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 17-00090 (2017).

25. Day CM, H Li, ED Cox, DK Horton, and DM Bullock. “A case study on the implementation of National Highway System performance measures proposed in new federal rule making.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 17-00091 (2017).

24. D Krohn, L Rymarcsuk, JK Mathew, CM Day, H Li, and DM Bullock. “Outcome assessment using connected vehicle data to justify signal investments to decision makers.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 17-00314 (2017).

23. Brennan TM, CM Day, and M Volovski. “Ranking statistically similar highway travel corridors using state speed datasets.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 17-00652 (2017).

22. Li H, CM Day, and DM. Bullock. “Virtual detection at intersections using connected vehicle trajectory data.” IEEE Conference on Intelligent Transportation Systems, Rio de Janeiro, Brazil (2016).

21. Day CM, SM Lavrenz, AL Stevens, RE Miller, and DM Bullock. “Extending link pivot offset optimization to arterials with single controller diverging diamond interchange.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 16-0111 (2016).

20. Li H, CM Day, JR Sturdevant, and DM Bullock. “Scaling detailed high-resolution data split performance measures to statewide system level management.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 16-4149 (2016).

19. Sajjadi S, CM Day, and K Bright. “Evaluating transit signal priority and offset optimization strategies in microsimulation using the Purdue coordination diagram.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 16-6760 (2016).

18. Day CM and DM Bullock. “Integrating outcome oriented performance measures into traffic signal operations business processes.” Proceedings, IEEE Conference on Intelligent Transportation Systems, Las Palmas de Gran Canaria, Spain, 131-136 (2015).

17. Day CM, SM Remias, H Li, DK Horton, and DM Bullock. “Comparative performance ranking of arterial sections to prioritize agency resource investments.” Mobil.TUM International Scientific Conference on Mobility and Transport, Munich, Germany (2015).

16. Day CM, H Li, AM Hainen, AL Stevens, JR Sturdevant, and DM Bullock. “Congestion ranking of protected and permitted movements across agency inventory.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 15-0062 (2015).

15. Brennan TM, CM Day, SM Remias, DK Horton, ED Cox, and DM Bullock. “Alternative performance measures and weighting for quantifying spatial and– temporal congestion using probe data.” ITS World Congress, Detroit, Michigan (2014).

14. Remias S, T Brennan, A Hainen, C Day, and D Bullock. “Characterizing urban mobility and travel time reliability along signalized corridors using probe data.” Mobil.TUM International Scientific Conference on Mobility and Transport, Munich, Germany (2013).

13. Hainen AM, SM Remias, TM Brennan, CM Day, and DM Bullock, “Probe vehicle data for characterizing road conditions associated with inclement weather to improve road maintenance decisions.” 2012 IEEE Intelligent Vehicles Symposium, Madrid, Spain (2012).

12. Remias SM, AM Hainen, GM Grimmer, AD Davis, CM Day, TM Brennan, and DM Bullock. “Leveraging high resolution signalized intersection data to characterize discharge headway distributions and saturation flow rate reliability.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 12-2122 (2012).

11. Day CM, DM Bullock, AP Nichols, TM Brennan, and CS Chou. “Integrating adaptive and traffic responsive algorithms.” Transportation Research Arena 2012, Athens, Greece. In Procedia – Social and Behavioral Sciences 48, 3451-3460 (2012).

Purdue University – Postdoctoral Researcher and Graduate Research Assistant (2006-2010)

10. Day CM, H Premachandra, and DM Bullock. “Rate of Pedestrian Signal Phase Actuation as a Proxy Measurement of Pedestrian Demand.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 11-0220 (2011).

9. Brennan TM, CM Day, JS Wasson, JR Sturdevant, and DM Bullock. “Assessing opportunities and benefits of alternative winter operation timing plans for signalized arterials.” Transportation Research Board Annual Meeting, Washington, DC, Paper No. 11-0010 (2011).

8. Bullock DM and CM Day. “Performance measures for managing urban traffic signal systems.” In WIT Transactions on the Built Environment, 107, 167-175, (2009). Southampton, UK: Wessex Institute of Technology Press, 2009.

7. Day CM and D Bullock. “Application of high resolution traffic signal controller data for platoon visualization and optimization of signal offsets.” Mobil.TUM International Scientific Conference on Mobility and Transport, Munich, Germany (2009).

Ball State University – Graduate Research Assistant (2004-2006)

6. Jin F, Y Liu, C Day, and S Little. “Degradation of vertically aligned carbon nanotubes at growth interface joints at high temperatures and its impact on electron emission properties.” Materials Research Society Symposium Proceedings, Paper No. 1137-EE05-09 (2008).

5. Jin F, Y Liu, C Day, and S Little. “A new thermionic cathode based on carbon nanotubes with a thin layer of low work function barium strontium oxide surface coating.” Materials Research Society Symposium Proceedings, Paper No. 1142-JJ15-41 (2008).

4. Jin F, Y Liu, CM Day, and SA Little. “Enhanced thermionic emission from barium strontium oxide coated carbon nanotubes.” Proceedings of the Eighth IEEE International Vacuum Electronics Conference (2007).

3. Liu Y, F Jin, CM Day, and SA Little. “Thermal and electrical degradation of carbon nanotubes.” Materials Research Society Symposium Proceedings, 963E, Q20.40 (2006).

2. Jin F and C Day. “Strong field enhanced thermionic electron emission from a new oxide coated carbon nanotube cathode.” IEEE International Conference on Plasma Science (2005).

1. Jin F and CM Day. “A new carbon nanotube-based field enhanced thermionic cathode.” Materials Research Society Symposium Proceedings 858E, HH13.33.1 (2004).

Book Chapters

2. Mahmud S and CM Day. “Leveraging Data-Driven Traffic Management in Smart Cities: Datasets for Highway Traffic Monitoring.” Invited contribution to The Rise of Smart Cities: Advanced Structural Sensing and Monitoring Systems, eds. A Alavi, M Feng, P Jao and Z Sharif-Khodaei, University of Pittsburgh (2022).

1. Day CM. “Traffic Signal System Evaluation with Simulation.” In Traffic Signal Simulation Cookbook, version 1.0, eds. Q He and T Li (2020). DOI: https://dx.doi.org/10.5281/zenodo.6636406 

Miscellaneous

4. Day CM, S Langdon, A Stevanovic, A Tanaka, K Lee, EJ Smaglik, L Overn, N Agarwal, L Richardson, and S Phillips. “Past, Present, and Future Trends in Traffic Signal Systems Research.” Traffic Signal Systems Committee Centennial Paper. Published online by Transportation Research Board (2019).

3. Day CM, M Taylor, J Mackey, R Clayton, S Patel, G Xie, H Li, JR Sturdevant, and DM Bullock. “Implementation of automated traffic signal performance measures.” ITE Journal, 86(8), 26-34 (2016).

2. Bullock DM, CM Day, TM Brennan, JR Sturdevant, and JS Wasson. “Architecture for active management of geographically distributed signal systems.” ITE Journal, 81(5), 20-24 (2011).

1. Bullock DM, JR Sturdevant, and CM Day. “Signalized intersection performance measures for operations decision making.” ITE Journal, 78(8), 20-23, (2008).

Primary Strategic Research Area

Resilient Infrastructures

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