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Justice Appiah, P.E., Ph.D.
Associate Principal Research Scientist

Phone: (434) 293-1952
Email: Justice.Appiah@VDOT.Virginia.gov

Research:

Traffic modeling and simulation
Traffic engineering and traffic control devices
Highway safety analysis
Traffic signal operations

Education:

Ph.D., Civil Engineering, University of Nebraska-Lincoln

M.S., Civil Engineering, Texas A&M University, College Station

B.Sc., Kwame Nkrumah Univ. of Sci. & Tech, Kumasi, Ghana

Registrations:

Registered Professional Engineer, Michigan, Virginia

Memberships:

Institute of Transportation Engineers
Standing Committee on Traffic Control Devices (AHB50), Transportation Research Board
Advanced Technologies Committee, ASCE Transportation and Development Institute
Transportation Statistics Interest Group, American Statistical Association

Honors/Awards:

Best Paper Award for “Safety Effects of Flashing Yellow Arrows Used in Protected Permitted Phasing: Comparison of Full Bayes and Empirical Bayes Results", (with King, Fontaine, and Cottrell), TRB Committee AHB50 (Traffic Control Devices), 2018
Horizon Award for “Significant Impact on the State of Practice in Transportation,” VTRC, 2016
International Road Federation Fellow, 2009
Charley V. Wootan Award for “Outstanding MS Thesis in Transportation Policy and Planning,” Council of University Transportation Centers, Washington DC, 2005

Team Memberships:

Safety, Operations, and Traffic Engineering

Projects:

124061 - Impact of Red Lights on Incident Response Time - Co-Principal Investigator

124130 - Evaluation of Post Mounted Delineators and Curve Warning Message Markings - Principal Investigator

119593 - Calibration of Safety Performance Functions for Freeway Ramp Terminals in Virginia - Principal Investigator

120025 - Methods to Analyze and Predict Interstate Travel Time Reliability – Phase II - Co-Principal Investigator

114314 - Development of a Methodology for Calibration and Validation of a Mesoscopic Traffic Simulation Model - Co-Principal Investigator

114313 - Investigation of the Factors that Affect Travel Time Reliability - Co-Principal Investigator

112006 - Examination of Features Correlated with Roadway Departure Crashes on Rural Roads - Principal Investigator

107904 - Alternatives to Protected-Only Left-Turn Phasing - Principal Investigator

00113 - Mesoscopic Modeling Guidance and Pilot Test - Principal Investigator

00066 - Simulation of Adaptive Signal Control - Co-Principal Investigator

104588 - Guidelines for Assessing Guardrail Needs on Two-Lane Rural Roadways in Virginia - Co-Principal Investigator

Publications:

23-R17 - Calibration of Highway Safety Manual Safety Performance Functions for Freeway Ramp Terminals in Virginia

23-R12 - Prediction of Interstate Travel Time Reliability: Phase II

22-R7 - Methodology for Calibration and Validation of Mesoscopic Traffic Simulation Models

22-R2 - Methods to Analyze and Predict Interstate Travel Time Reliability

21-R2 - Examination of Features Correlated With Roadway Departure Crashes on Rural Roads

19-R10 - Safety and Operations Guidance for Using Time-of-Day Protected-Permissive Left-Turn Phasing Using Flashing Yellow Arrows

16-R5 - A Benefit-Cost Analysis Tool for Assessing Guardrail Needs for Two-Lane Rural Roads in Virginia