H. Christopher Frey

All papers authored by H. Christopher Frey

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2019 Weichang Yuan, H. Christopher Frey

, Tongchuan Wei, Nikhil Rastogi, Steven VanderGriend, David Miller, Lawrence Mattison

Comparison of real-world vehicle fuel use and tailpipe emissions for gasoline-ethanol fuel blends

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Weichang Yuan, H. Christopher Frey

, Nikhil Rastogi

Quantification of Energy Saving Potential for A Passenger Train Based on Inter-Run Variability in Speed Trajectories

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Tanzila Khan, H. Christopher Frey

Effect of Air-Conditioning on Light Duty Gasoline Vehicles Fuel Economy

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2018 Wenwei Che

, H. Christopher Frey

, Zhiyuan Li, Xiangqian Lao, Alexis K. H. Lau

Indoor Exposure to Ambient Particles and Its Estimation Using Fixed Site Monitors

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Shams Tanvir, H. Christopher Frey

, Nagui M. Rouphail

Effect of Light Duty Vehicle Performance on a Driving Style Metric

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Samuel L. Altshuler, Alberto Ayala, Susan Collet, Judith C. Chow, H. Christopher Frey

, Rashid Shaikh, Eric D. Stevenson, Michael P. Walsh, John G. Watson

Trends in on-road transportation, energy, and emissions

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Prashant Kumar, Allison P. Patton, John L. Durant, H. Christopher Frey

A review of factors impacting exposure to PM2.5, ultrafine particles and black carbon in Asian transport microenvironments

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This paper is made freely available by the publisher.

Prashant Kumar

, Ioar Rivas, Anant Pratap Singh, Vikas Julius Ganesh, Monirupa Ananya, H. Christopher Frey

Dynamics of coarse and fine particle exposure in transport microenvironments

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2017 Zhiyuan Li, Wenwei Che, H. Christopher Frey

, Alexis K. H. Lau

, Changqing Lin

Characterization of PM 2.5 exposure concentration in transport microenvironments using portable monitors

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H. Christopher Frey

, Maryam Delavarrafiee, Sanjam Singh

Real-World Freeway and Ramp Activity and Emissions for Light-Duty Gasoline Vehicles

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This paper was not found in any repository; the policy of its publisher is unknown or unclear.

2016 Brandon M. Graver, H. Christopher Frey

, Jiangchuan Hu

Effect of Biodiesel Fuels on Real-World Emissions of Passenger Locomotives

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H. Christopher Frey

Dose-Response Models are Conditional on Determination of Causality

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Gurdas S. Sandhu, H. Christopher Frey

, Shannon Bartelt-Hunt, Elizabeth Jones

Real-world activity, fuel use, and emissions of diesel side-loader refuse trucks

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Tanzila Khan, H. Christopher Frey

Evaluation of Light-Duty Gasoline Vehicle Rated Fuel Economy Based on In-Use Measurements

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Wenwei W. Che, Henry Christopher Frey

, Alexis K. H. Lau

Sequential Measurement of Intermodal Variability in Public Transportation PM2.5 and CO Exposure Concentrations

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Jiangchuan Hu, H. Christopher Frey

, Scott S. Washburn

Comparison of Vehicle-Specific Fuel Use and Emissions Models Based on Externally and Internally Observable Activity Data

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2015 Brandon M. Graver, H. Christopher Frey

Comparison of Over-the-Rail and Rail Yard Measurements of Diesel Locomotives

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Bin Liu, H. Christopher Frey

Variability in Light Duty Gasoline Vehicle Emission Factors from Trip-Based Real-World Measurements

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Xuesong Zhou, Shams Tanvir, Hao Lei, Jeffrey Taylor, Bin Liu, Nagui M. Rouphail, H. Christopher Frey

Integrating a simplified emission estimation model and mesoscopic dynamic traffic simulator to efficiently evaluate emission impacts of traffic management strategies

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W. W. Che, H. Christopher Frey

, Alexis K. H. Lau

Comparison of Sources of Variability in School Age Children Exposure to Ambient PM2.5

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All papers authored by H. Christopher Frey