Hyung-Wook Choi

Portable emission measurement system for emissions of passenger rail locomotives

Transportation Research Record, (2289), 56–63.

In-use measurement of activity, energy use, and emissions of a plug-in hybrid electric vehicle

Environmental Science and Technology, 45(20), 9044–9051.

Estimating diesel vehicle emission factors at constant and high speeds for short road segments

Transportation Research Record, (2158), 19–27.

Method for in-use measurement and evaluation of the activity, fuel use, electricity use, and emissions of a plug-in hybrid diesel-electric school bus

Environmental Science and Technology, 44(9), 3601–3607.

Light duty gasoline vehicle emission factors at high transient and constant speeds for short road segments

Transportation Research. Part D, Transport and Environment, 14(8), 610–614.