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 & 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 & 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.