01657418

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The fuel consumption factor (FCF) is one of key parameters in the fuel consumption estimation model. The traditional method to obtain FCFs involves massive vehicle tests and a complex computational process. The concept of the speed correction factor (SCF) was introduced by existing studies to adjust the baseline FCFs for capturing the effects of traffic conditions in terms of different average speeds. The objective of this paper was to propose a generalized SCF, called comprehensive speed correction factor (CSCF), by incorporating the vehicle unit weight. First, ten common vehicle types with different weights were selected for the study. It was found that there was a positive correlation between fuel consumption factors per unit weight (FCFUWs) and the corresponding vehicle weights. Second, a power function was determined to describe the correlation between the FCFUW and the average speed. The resulting R 2 of the fitting functions were all higher than 0.9. Besides, the parameters of the power function were proved to be dependent of the average speed and independent of the road class. Finally, the CSCF model was developed based on the FCFUW, which was a function of the vehicle weight and the average speed. It can be applied to any vehicle types with different weights. A case study with a relative error of 3.8% confirmed the feasibility and accuracy of the proposed CSCF model for the fuel consumption estimation.

This paper was sponsored by TRB committee ADC20 Standing Committee on Transportation and Air Quality.

18-03198

English

15p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References; Tables

Estimation theory; Factor analysis; Fuel consumption; Speed; Traffic flow; Traffic speed; Vehicle weight

Energy; Highways; Vehicles and Equipment

Transportation Research Board Annual Meeting 2018 Paper #18-03198

TRIS, TRB, ATRI

Jan 8 2018 10:46AM