A Novel Hybrid Model for Short-Term Traffic Flow Prediction Based on Extreme Learning Machine and Improved Kernel Density Estimation

Leina Zhao, Yujia Bai (), Sishi Zhang, Yanpeng Wang, Jie Kang and Wenxuan Zhang
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Leina Zhao: College of Mathematics and Statistics, Chongqing Jiaotong University, Chongqing 400074, China
Yujia Bai: College of Mathematics and Statistics, Chongqing Jiaotong University, Chongqing 400074, China
Sishi Zhang: College of Mathematics and Statistics, Chongqing Jiaotong University, Chongqing 400074, China
Yanpeng Wang: School of Traffic and Transportation, Chongqing Jiaotong University, Chongqing 400074, China
Jie Kang: School of Information Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Wenxuan Zhang: School of Information Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China

Sustainability, 2022, vol. 14, issue 24, 1-16

Abstract: Short-term traffic flow prediction is the basis of and ensures intelligent traffic control. However, the conventional models cannot make accurate predictions due to the strong nonlinearity and randomness in short-term traffic flow data. To this end, the authors of this paper developed a novel hybrid model based on extreme learning machine (ELM), adaptive kernel density estimation (AKDE), and conditional kernel density estimation (CKDE). Specifically, the ELM model was employed for nonlinear prediction. Then, AKDE was established to estimate the bandwidth of CKDE (i.e., AKDE-CKDE), which predicted the training residuals obtained by ELM. Finally, the predicted results of the two models were superimposed to derive the final prediction of the hybrid model. Two case studies based on measured data were conducted to evaluate the performance of the proposed method. The experimental results indicate that the proposed method can realize a significant improvement in terms of forecasting accuracy in comparison with the other concerned models. For instance, it performed better than the single ELM model, with an improvement in the evaluation criterion of a mean relative percentage error of 7.46%.

Keywords: short-term traffic flow prediction; hybrid model; ELM; AKDE-CKDE (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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