Jun Liu, PhD

Refereed Journal Papers 

(Total = 22 since 2015; Average Impact Factor = 2.5+; * indicates Dr. Liu's advisor or principle investigator at the time of the work)

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2018

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• Loeb, B., K. Kockelman & J. Liu. Shared Autonomous Electric Vehicle (SAEV) Operations across the Austin, Texas Network with a Focus on Charging Infrastructure Decisions. Transportation Research Part C: Emerging Technologies, 2018, 89, 222-233. DOI: 10.1016/j.trc.2018.01.019. 

• Liu, J. & A. Khattak*. Are Gates at Rail Grade Crossings always Safe? Examining Motorist Gate-Violation Behaviors Using Path Analysis. Forthcoming in Transportation Research Part F: Psychology and Behaviour, 2018. 

• Liu, J., A. Khattak, C. Chen, D. Wan, J. Ma & J. Hu. Revisiting Hit-and-Run Crashes: A Geo-spatial Method. Forthcoming in Transportation Research Record: Journal of Transportation Research Board, 2018.

• Rios-Torres, J., J. Liu & A. Khattak. Personal Fuel Consumption in Conventional and Hybrid Electric Vehicles: Integrating Driving Cycle Predictions with Power Distribution Optimization. Forthcoming in International Journal of Sustainable Transportation, 2018. 

• Zhang, M., A. Khattak, J. Liu & D. Clarke. A Comparative Study of Rail-Pedestrian Trespassing Crash Injury Severity at Highway-Rail Grade Crossings and Non-Crossings. Forthcoming in Accident Analysis & Prevention, 2018. 

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2017

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• Liu, J., K. Kockelman*, P. Boesch & F. Ciari. Tracking a System of Shared Autonomous Vehicles across the Austin, Texas Network using Agent-Based Simulation. Transportation. 2017, 44(6), 1261-1278. DOI: 10.1007/s11116-017-9811-1. ^The free full-text is currently available online at http://rdcu.be/veh9. 

• Liu, J. & A. Khattak*. Gate-Violation Behavior at Highway-Rail Grade Crossings and the Consequences: Using Geo-Spatial Modeling Integrated with Path Analysis. Accident Analysis & Prevention, 2017,109, pp.99-112. DOI: 10.​1016/​j.​aap.​2017.​10.​010

• Greene, D.*, J. Liu, A. Khattak*, B. Wali., J. Hopson & R. Goeltz.  How does On-Road Fuel Economy Vary with Vehicle Cumulative Mileage and Daily Use? Transportation Research Part D: Transport and Environment. 2017, 55, pp.142-161. DOI: 10.1016/j.trd.2017.06.004

• Liu, J., A. Khattak* & X. Wang. A Comparative Study of Driving Performance in Metropolitan Regions Using Large-scale Vehicle Trajectory Data: Implications for Sustainable Cities. International Journal of Sustainable Transportation, 2017, 11, pp.170-185. DOI: 10.1080/15568318.2016.1230803

• Liu, J., A. Khattak* & B. Wali. Do Safety Performance Functions Used for Predicting Crash Frequency Vary Across Space? Applying Geographically Weighted Regressions to Account for Spatial Heterogeneity. Accident Analysis & Prevention, 2017,109, pp.132-142. DOI: 10.1016/j.aap.2017.10.012. ^The free full-text is currently available at: https://authors.elsevier.com/a/1VwQwLDQpHU8

• Greene, D.*, A. Khattak*, J. Liu, X. Wang, J. Hopson & R. Goeltz. What is the Evidence Concerning the Gap between On-Road and Environmental Protection Agency Fuel Economy Ratings? Transport Policy, 2017, 53, pp.146-160. DOI: 10.​1016/​j.​tranpol.​2016.​10.​002

 

2016

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• Liu, J. & A. Khattak*. Delivering Improved Alerts, Warnings, and Control Assistance Using Basic Safety Messages Transmitted between Connected Vehicles. Transportation Research Part C: Emerging Technologies, 2016, 68, 83-100. DOI: 10.1016/j.trc.2016.03.009

• Liu, J., X. Wang & A. Khattak*. Customizing Driving Cycles to Support Vehicle Purchase and Use Decisions: Fuel Economy Estimation for Alternative Fuel Vehicle Users. Transportation Research Part C: Emerging Technologies, 2016, 67, pp.280-298. DOI: 10.1016/j.trc.2016.02.016

• Liu, J., A. Khattak* & M. Zhang. What Role do Pre-crash Driver Actions Play in Work Zone Crashes? Application of Hierarchical Models to Crash Data. Transportation Research Record: Journal of Transportation Research Board, 2016, 2555, pp.1-11. DOI: 10.3141/2555-01

• Wang, X., J. Liu, A. Khattak* & D. Clarke. Non-crossing Rail-Trespassing Crashes in the Past Decade: A Spatial Approach to Analysis of Injury Severity. Safety Science,  2016, 82, pp.44-55. DOI: 10.1016/j.ssci.2015.08.017

• Khattak, A.*, J. Liu, B. Wali, X. Li & M. Ng. Modeling Traffic Incident Duration Using Quantile Regression. Transportation Research Record: Journal of Transportation Research Board, 2016, 2554, pp.139-148. DOI: 10.3141/2554-15

• Wan, D., C. Kamga, J. Liu, A. Sugiura & E. Beaton. Rider Perception of a "light" Bus Rapid Transit system - the New York City Select Bus Service. Transport Policy, 2016, 49, pp.41-55. DOI: 10.1016/j.tranpol.2016.04.001

• Liu, J., B. Bartnik, S. Richards* & A. Khattak*. Driver Behavior at Highway Rail Grade Crossings with Passive Traffic Controls: A Driving Simulator Study. Journal of Transportation Safety and Security, 2016, 8, pp.37-55. DOI: 10.1080/19439962.2015.1043478

• Liu, J., X. Wang, A. Khattak*, J. Hu, J. Cui & J. Ma. How Big Data Serves for Freight Safety Management at Highway-Rail Grade Crossings? A Spatial Approach Fused with Path Analysis. Neurocomputing, 2016, 181, pp.38-52. DOI:10.1016/j.neucom.2015.08.098

 

2015

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• Liu, J., A. Khattak*, S. Richards & S. Nambisan. What are the Differences in Driver Injury Outcomes at Highway-Rail Grade Crossings? Untangling the Role of Pre-Crash Behaviors. Accident Analysis & Prevention, 2015, 85, pp.157-169. DOI: 10.1016/j.aap.2015.09.004

• Liu, J., A. Khattak* & X. Wang. The Role of Alternative Fuel Vehicles: Using Behavioral and Sensor Data to Model Hierarchies in Travel. Transportation Research Part C: Emerging Technologies, 2015, 55, pp.379-392. DOI: 10.1016/j.trc.2015.01.028

• Wang, X., A. Khattak*, J. Liu, G. Masghati-Amoli & S. Son. What is the Level of Volatility in Instantaneous Driving Decisions? Transportation Research Part C: Emerging Technologies , 2015, 58, pp.413-427. DOI: 10.1016/j.trc.2014.12.014

 

Technical Reports

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• Liu, J., A. Nichols & K. Kockelman. Chapter 8 of Bringing Smart Transport to Texans: Ensuring the Benefits of a Connected and Autonomous Transport System in Texas (No. FHWA/TX-16/0-6838-2). Submitted to Texas Department of Transportation, 2016.

• Kockelman, K., L. Loftus-Otway, D. Stewart, A. Nichols, W. Wagner, J. Li, S. Boyles, M. Levin & J. Liu. Best Practices Guidebook for Preparing Texas for Connected and Automated Vehicles (No. 0-6849-P1). TxDOT Project 0-6849: Implications of Automated Vehicles on Safety, Design and Operation of the Texas Highway System. Submitted to Texas Department of Transportation, 2016.

• Kockelman, K., L. Loftus-Otway, D. Stewart, A. Nichols, W. Wagner, S. Boyles, M. Levin, , J. Liu, K. Perrine, S. Kilgore & K.M. Gurumurthy. Best Practices for Modifying Transportation Design, Planning, and Project Evaluation in Texas (No. 0-6847-P1). TxDOT Project 0-6847: An Assessment of Autonomous Vehicles: Traffic Impacts and Infrastructure Needs. Submitted to Texas Department of Transportation, 2017.

• Khattak, A., J. Liu, & B. Wali, Highway Safety Manual: Spatial Heterogeneity, Transferability, Non-Linearities in Safety Performance Functions. Submitted to Southeastern Transportation Center (Sponsored by US Department of Transportation), 2016.

• Khattak, A., J. Liu, B. Wali, M. Kamrani & M. Zhang, Big Data Generated by Connected and Automated Vehicles for Safety Monitoring, Assessment and Improvement. Submitted to Southeastern Transportation Center (Sponsored by US Department of Transportation), 2016.

• Greene, D., A. Khattak, J. Liu, J. Hopson, X. Wang & R. Goeltz. How Do Motorists' Own Fuel Economy Estimates Compare with Official Government Ratings? A Statistical Analysis. Submitted to Oak Ridge National Laboratory, 2015.

• Khattak, A., J. Liu, & X. Wang. Big Data for Safety Monitoring, Assessment and Improvement. Submitted to Southeastern Transportation Center (Sponsored by US Department of Transportation), 2015.

• Khattak, A., J. Liu & M. Zhang. Highway Safety Manual: Enhancing the Work Zone Analysis Procedure. Submitted to Southeastern Transportation Center (Sponsored by US Department of Transportation), 2015.

• Khattak, A., J. Liu, X. Wang & M. Zhang, What Is the Extent of Harm in Railroad Crashes? Submitted to National University Rail Center (Sponsored by US Department of Transportation), 2015

• Khattak A., X. Wang, J. Liu, J. Bandeira & S. Son. Reducing Energy Use and Emissions through Innovative Technologies and Community Designs. Submitted to Transportation for Livability by Integrating Vehicles and the Environment (Sponsored by US Department of Transportation), 2015.

• Khattak A., X. Wang, S. Son, & J. Liu. Data Needs Assessment for Making Transportation Decisions in Virginia. Submitted to Virginia Department of Transportation, Richmond, VA, 2014.

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