Nagui M. Rouphail Professor of Civil Engineering Transportation Systems and Materials Office: 423 Mann Hall Phone: (919) 515-1154 Fax: (919) 515-7908 E-mail: rouphail@eos.ncsu.edu

Research Interests

Traffic flow theory and control.

Education

PhD, Civil Engineering, Ohio State University, 1981

MS, Civil Engineering, Ohio State University, 1977

BS, Civil Engineering, Cairo University, 1972

Representative Publications

Rouphail, N.M., A. Tarko and C. Li "Signalized Intersections," Draft Chapter 9 of Traffic Flow Theory Monograph, January 1996.

Nemeth, Z., A. Rathi and N. Rouphail, "Traffic Control at Freeway Work Sites," in Civil Engineering Practice, Technomic Publishing, N.J., 1988, pp. 211-231.

El-Dessouki, W., N. Rouphail, R. M. Beja and R. Ranjithan (1998), "Mutiperiod Highway Improvement and Construction Scheduling: Model Development and Application," in press, Transportation Research Record Series, TRB, Washington, D.C.

Tarko, A. and N. Rouphail (1997), "Intelligent Traffic Data Processing for ATIS Applications," in ASCE Journal of Transportation Engineering, July/August 1997, Volume 123(4), pp. 298-307.

Fambro, D. and N. Rouphail (1997), "Generalized Delay Model for Signalized Intersections and Arterials," in press, Transportation Research Record 1572, TRB, Washington, D.C., pp.112-121.

Rouphail, N.M., M. Anwar, D. Fambro. P. Sloup and C. Perez (1997), "Validation of a Generalized Delay Model for Vehicle-Actuated Signals," in press, Transportation Research Record 1572, TRB, Washington, D.C., pp. 105-111.

Engelbert, R., D. Fambro and N. Rouphail (1997), "Validation of Generalized Delay Model for Oversaturated Conditions," in press, Transportation Research Record 1572, TRB, Washington, D.C., pp. 122-130.

Rouphail, N.M. and B. Eads, "Pedestrian Impedance on Turning Movements Saturation Flow Rates: A Comparison of Simulation, Analytical and Field Observations" (1997), Transportation Research Record 1578, TRB, Washington, D.C., pp. 56-63.

Ran, B., N.M. Rouphail, A. Tarko and D. Boyce (1997), "Toward a Class of Link Travel Time Functions for Dynamic Assignment Models on Signalized Networks," in Transportation Research, part B: Methodological, 31(4), pp. 277-290.

Li, J., N.M. Rouphail and A. Tarko (1996), "An Overflow Delay Model for Signalized Arterials," in Transportation Research Record 1555, TRB, Washington, D.C., pp. 1-8.

Rouphail, N.M. and A. Akcelik (1996), "More Signal Capacity, with Less Green ?", in ITE Journal, 66(7), July 1996, pp. 34-40.

Daniel, J., D. Fambro and N.M. Rouphail (1996), "Accounting for Non-Random Arrivals in the Estimate of Delays at Signalized Intersections," in Transportation Research Record 1555, TRB, Washington, D.C., pp. 9-16.

Rouphail, N. and Z. Khatib (1994), "Arterial Signal Optimization Considering Left-Turn Control," in Transportation Research Record 1456, TRB, Washington, D.C., pp. 72-82.

Tarko, A. and Rouphail, N. (1994), "A Distribution-Free Model for Estimating Random Queues in Signalized Networks," in Transportation Research Record 1457, TRB, Washington, D.C., pp. 192-197.

Li, J., N. Rouphail and R. Akcelik (1994), "Overflow Delay Estimation for a Simple Intersection with Fully-Actuated Signal Control," in Transportation Research Record 1457, TRB, Washington, D.C., pp. 73-81.

Sisiopiku, V. and N. Rouphail (1994), "Toward the Use of Detector Output for Arterial Link Travel Time Estimation," in Transportation Research Record 1457, TRB, Washington, D.C., pp. 158-166.

Sisiopiku, V., N. Rouphail and A. Santiago (1994), "Analysis of the Correlation Between Arterial Travel Times and Detector Data from Simulation and Field Studies," in Transportation Research Record 1457, TRB, Washington, D.C., pp. 166-173.

Akcelik, A. and N. Rouphail (1994), "Overflow Queues and Delays with Random and Platooned Arrivals," in Journal of Advanced Transportation, Vol. 28(3), pp. 227-251.

Tarko, A., N. Rouphail and R. Akcelik (1993), "Overflow Delay at Signalized Intersection Approach Influenced by an Upstream Signal," in Transportation Research Record 1398, TRB, Washington, D.C., pp. 82-89.

Fazio, J, J. Holden and N. Rouphail (1993), "Use of Freeway Conflict Rates as an Alternative to Crash Rates in Weaving Section Safety Analysis," in Transportation Research Record 1401, TRB, Washington, D.C., pp. 61-69.

Akcelik, A. and N. Rouphail (1993), "Estimation of Delays at Traffic Signals for Variable Demand Conditions," in Transportation Research, Part B: Methodological, Vol 27(2), pp. 109-131.

Rouphail, N. and R. Akcelik (1992), "Oversaturation Delay Estimates with Consideration of Peaking," in Transportation Research Record 1365, TRB, Washington, D.C., pp. 71-81.

Rouphail et al. (1991), "A Program of Research in Highway Capacity," in Transportation Research Circular 371, TRB, Washington, D.C., 30 pp.

Rouphail, N. (1991), "Cycle by Cycle Analysis of Congested Flows at Signalized Intersections," in ITE Journal, Vol 61(3), pp. 33-36.

Sheng, Y.Z., R. Paaswell and N. Rouphail (1991), "Growth or Urban Transportation: People's Republic of China," in Journal of Advanced Transportation, Vol 25(1), pp. 95-104.

Rouphail, N. (1990), "A Traffic Model of Platoon and Secondary Flows," in Archive of Transport, Polish Academy of Sciences, Vol 2(2), pp. 85-97.

Rouphail, N. and A.E. Radwan (1990), "Simultaneous Optimization of Signal Settings and Left Turn Treatments, in Transportation Research Record 1287, TRB, Washington, D.C., pp. 1-10.

Fazio, J and N. Rouphail (1990), "Conflict Simulation in INTRAS: Applications to Weaving Area Capacity Analysis," in Transportation Research Record 1287, TRB, Washington, D.C., pp. 96-107.

Mousa, R. and N. Rouphail (1990), "An Integrated Microscopic Simulation /Optimization Model: Application to Freeway Work Zone Traffic Analysis," in Transportation Research Record 1254, TRB, Washington, D.C., pp. 14-25.

Rouphail, N. (1989), "Progression Adjustment Factors for Signalized Intersections," in Transportation Research Record 1225, TRB, Washington, D.C., pp. 8-17.

Mousa, R. and N. Rouphail (1989), "Effects of Platoons on Permissive Left Turns: A Pilot Study, in ASCE Journal of Transportation Engineering, Vol 115 (2), pp. 208-215.

Joseph, T., A.E. Radwan and N. Rouphail (1988), "Work Zone Analysis Model for Signalized Arterials, in Transportation Research Record 1194, TRB, Washington, D.C., pp. 112-119.

Rouphail, N. (1988), "Delay Models for Mixed Platoon and Secondary Flows," in ASCE Journal of Transportation Engineering, Vol 114(5), pp. 131-152.

Sadegh, A., A.E. Radwan and N. Rouphail (1988), "ARTWORK: A Simulation Model of Urban Arterial Work Zones," in Transportation Research Record 1163, TRB, Washington, D.C., pp. 1-4.

Rouphail, N., J. Fazio and Z.S. Yang (1988), "A Comparative Study of Short and Long Term Urban Freeway Work Zones," in Transportation Research Record 1163, TRB, Washington, D.C., pp.4-15.

Yang, Z.S., N. Rouphail and R. Paaswell (1987), "Urban Transportation in the People's Republic of China," in ITE Journal, Vol 57(3), pp. 25-29.

Rouphail, N. (1986), "Analytical Warrant for Separate Left Turn Phasing," in Transportation Research Record 1069, TRB, Washington, D.C., pp. 20-24.

Fazio, J. and N. Rouphail (1986), "Freeway Weaving Sections: Comparison and Extension of Operational Analysis Procedures," in Transportation Research Record 1091, TRB, Washington, D.C., pp. 101-109.

Rouphail, N. (1985), "Minimum-Cost Flexible Pavement Design," in ASCE Journal of Transportation Engineering, Vol 11(3), pp. 196-207.

Rouphail, N. and G. Tiwari (1985), "Flow Characteristics at Freeway Lane Closures," in Transportation Research Record 1035, TRB, Washington, D.C., pp. 50-58.

Rouphail, N.. (1984), "Operational Analysis of Bus Priority Strategies," in Transportation Research Record 994, TRB, Washington, D.C., pp. 30-35.

Rouphail, N. (1984), "Mid-Block Crosswalks: A User Behavior and Preference Study," in Transportation Research Record 959, TRB, Washington, D.C., pp. 41-47.

Rouphail, N. (1984), "Analysis of TANSYT Platoon Dispersion Algorithm," in Transportation Research Record 905, TRB, Washington, D.C., pp. 72-80.

Nemeth, Z. and N. Rouphail (1983), "Traffic Control at Freeway Work Sites," in ASCE Journal of Transportation Engineering, Vol 109(1), pp. 1-15.

Nemeth, Z. and N. Rouphail (1982), "Lane Closures at Freeway Work Zones: A Simulation Study, in Transportation Research Record 869, TRB, Washington, D.C., pp. 19

Rouphail, N. and Nemeth, Z. (1982), "A Driver Based Study of Freeway Construction Lane Closures, in ITE Journal, Vol 52(6), pp. 18-21.

Rouphail, N. and D. Fambro (1998), "Delay and Queue Length Models for Congested Arterials," Paper submitted for Consideration for Presentation at the Third International Symposium on Highway Capacity, Copenhagen, Denmark, June 22-27.

Rouphail, N., J. Hummer and R. Goldblatt (1998), "Pedestrian and Bicycle Impacts on Signalized Intersection Performance: The U.S. Experience," Paper submitted for Consideration for Presentation at the Third International Symposium on Highway Capacity, Copenhagen, Denmark, June 22-27.

Bloomberg, L., J. Clark, S. Cohen, B. Eads, F. Hall, A. May, A., Rathi, N. Rouphail and T. Urbanik, "Capacity and Level of Service Analysis of Freeway Systems," Paper submitted for Consideration for Presentation at the Third International Symposium on Highway Capacity, Copenhagen, Denmark, June 22-27.

Allen, P., J. Hummer, N. Rouphail and F. Milazzo (1997), "The Effects of Bicycles on the Capacity of Signalized Intersections," submitted for consideration for publication to the Transportation Research Board, Washington, D.C.

Milazzo, J., N. Rouphail, J. Hummer and P. Allen (1997), "The Effects of Pedestrians on the Capacity of Signalized Intersections," submitted for consideration for publication to the Transportation Research Board, Washington, D.C.

Allen, P., N. Rouphail, J. Hummer and J. Milazzo (1997), "Operational Analysis of Uninterrupted Bicycle Facilities," submitted for consideration for publication to the Transportation Research Board, Washington, D.C.

Rouphail, N. and D. Fambro (1997), "Delay Models for Congested Arterials Including Spillback Effects," in preparation for submittal to the ASCE Journal for Transportation Engineering.

Milazzo, J., N. Rouphail, P. Allen and J. Hummer (1997), "Proposed Revisions to Highway Capacity Manual Chapter 9 Pedestrian and Bicycle Analysis Procedures," Proceedings of the ASCE Specialty Conference: Traffic Congestion and Safety in the 21st Century, Chicago, IL, June 8-11, 1997

Tarko, A. and N. Rouphail (1995), "Congestion Detection in Large Sace Advanced Traveller Information Systems, Proceedings of the IFAC/IFORS/IMACS Symposium LSS'95: Large Scale Systems Theory and Applications, London, UK , July 11-13.

Rouphail, N., R. Ranjithan, W. El Dessouki, T. Smith and E.D. Brill (1995), "A Decision Support System fr Dynamic Pre-Trip Planning," Proceedings of ASCE International Conference on Application of Advanced Technologies in Transportation (AATT), Capri, Italy, June 27-30.

Rouphail, N. and N. Dutt (1995), "Estimating Travel Time Distributions for Signalized Links: Model Development and Potential IVHS Applications," Proceedings of ITS America Annual Meeting, Washington, D.C., March 15-17.

Boyce, D., N. Rouphail and A. Kirson (1993), "Estimation and Measurement of Link Travel Time in the ADVANCE Project," Proceedings, IEE-IEEE Vehicle Navigation and Information Systems Conference., Ottawa, Canada, October 12-15.

Tarko, A., N. Tsai and N. Rouphail (1993), "Detection of Traffic Congestion in ADVANCE-like Systems Using Fuzzy Operator Logic," Proceedings, Intelligent Vehicles 93 Symposium, Tokyo, Japan, July 14-16.

Tarko, A. and N. Rouphail (1993), "Travel Time Data Fusion in ADVANCE," Proceedings, Volume I, ASCE Third Annual International Conference on Applications of Advanced Technologies in Transportation (AATT), Seattle, Washington, July 1993.

Rouphail, N. and R. Akcelik (1992) , "A Preliminary Model of Queue Interaction at Paired Intersections," Proceedings of the 16th Annual ARRB Meeting, Perth, Australia, November 9-12.

Rouphail et al (1997), Literature Synthesis for Chapter 13: Pedestrians, for the Highway Capacity Manual, Draft Final Report Submitted to the Highway Safety Research Center, UNC-CH and FHWA, July 1997

Rouphail et al (1997), Recommended Procedures for Chapter 9: Signalized Intersections, for the Highway Capacity Manual, Draft Final Report Submitted to the Highway Safety Research Center, UNC-CH and FHWA, May 1997

Click, S. and N. Rouphail (1997), Using Advanced Vehicle Monitoring Systems to Extend System Capacity on North Carolina Freeways, Final Report Submitted to the NCDOT, March 1997.

Rouphail, N. and S. Click (1997), Field Assessment of the Performance of Computer-Based Signal Timing Methods at Individual Intersections in North Carolina, Working Paper 2: Field Data Collection Workplan, Submitted to the NCDOT, March 1997.

Rouphail, N. and W. ElDessouki (1997), Models for Evacuation Planning and Network Analysis Systems, Draft Interim Report Submitted to Lockheed Martin, ORNL, March 1997.

Rouphail, N. and S. Click (1997), Field Assessment of the Performance of Computer-Based Signal Timing Methods at Individual Intersections in North Carolina, Working Paper 1: Initial Model Review and Evaluation, Submitted to the NCDOT, February 1997.

Rouphail et al (1997), Recommended Procedures for Chapter 14: Bicycles, of the Highway Capacity Manual, Final Report Submitted to the Highway Safety Research Center, UNC-CH and FHWA, February 1997

Rouphail et al (1997), Bicycle Operations and Level of Service Literature Synthesis, Report Submitted to the Highway Safety Research Center, UNC-CH & FHWA, January 1997.

Fambro, D., N Rouphail, P. Sloup, J. Daniel and Li, J. (1996) , Highway Capacity Manual Revisions of Chapters 9 and 11, Final Report Submitted to FHWA, January 1996.

Rouphail et al (1995), A Plan for the Deployment of Advanced Transportation Systems in the Research Triangle Region, Final Report Submitted to NCDOT and FHWA. Vol I: Executive Summary, Vol II: Final Report, Vol III: Appendixes, December 1995.

Rouphail et al (1994) A Plan for the Deployment of Advanced Transportation Systems in the Research Triangle Region: Working Paper #1: Transportation Needs and Preliminary Options, North Carolina State University, October 1994.

Rouphail, N., Bamford, R. and J. Raj (1993), Calibration and Validation of Capacity Analysis Procedures for Left Turn Lanes in Illinois, Phase II Final Report, August 1993.

Rouphail, N. A. Tarko and V. Sisiopiku (1993), Proposed Data Fusion for ADVANCE Release 1.5. Urban Transportation Center, University of Illinois at Chicago, ADVANCE Working Paper Series No. 30, September 1993.

Rouphail, N. and V. Sisiopiku (1993), Travel Time Loop Detector Output Analysis on Dundee Road Closed Loop Signal System, Urban Transportation Center, University of Illinois at Chicago, ADVANCE Working Paper Series No. 24, June1993.

Rouphail, N., A. Tarko, P. Nelson and P. Palacharla (1993), Travel Time Data Fusion in ADVANCE: A Preliminary Design Concept, Urban Transportation Center, University of Illinois at Chicago, ADVANCE Working Paper Series No. 21, January1993.

Rouphail, N., N. Thomas, R. Bamford, J. Raj and O. Al-Jayoussi (1992), Calibration and Validation of Capacity Analysis Procedures for Left Turn Lanes in Illinois, Phase I Final Report, July 1992.

Rouphail, N., N. Thomas (1992), Review of Incident Detection Algorithms and Identification of Alternative Approaches to Incident Detection, Urban Transportation Center, University of Illinois at Chicago, ADVANCE Working Paper Series No. 13, June 1992.

Professional Memberships

American Society of Civil Engineers

Transportation Research Board

Institute of Transportation Engineers