  The paper investigates the features of emissions and fuel consumption (EFC)
in a car-following (CF) platoon based on two experimental datasets. Four
classical EFC models are employed and a universal concave growth pattern of the
EFC along a platoon has been demonstrated. A general framework of coupling EFC
and CF models is tested by calibrating and simulating three classical CF
models. This work first demonstrates that, at vehicle-pair level, all models
perform well on EFC prediction. The intelligent driver model outperforms the
other CF models on calibration accuracy, but this is not true on EFC
prediction. Second, at platoon level, the predicted EFC is nearly constant
along the platoon which qualitatively differs from the experimental
observation. The investigation highlights that accurate estimations at vehicle
level may be insufficient for analysis at platoon level due to the significant
role of oscillation growth and evolution in EFC estimation.
