Short-Term Traffic Flow Prediction: A Method of Combined Deep Learnings
Short-term traffic flow prediction can provide a basis for traffic management and support for travelers to make decisions. Accurate short-term traffic flow prediction also provides necessary conditions for the sustainable development of the traffic environment. Although the application of deep learn...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Journal of Advanced Transportation |
| Online Access: | http://dx.doi.org/10.1155/2021/9928073 |
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| _version_ | 1850227737169494016 |
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| author | Chuanxiang Ren Chunxu Chai Changchang Yin Haowei Ji Xuezhen Cheng Ge Gao Heng Zhang |
| author_facet | Chuanxiang Ren Chunxu Chai Changchang Yin Haowei Ji Xuezhen Cheng Ge Gao Heng Zhang |
| author_sort | Chuanxiang Ren |
| collection | DOAJ |
| description | Short-term traffic flow prediction can provide a basis for traffic management and support for travelers to make decisions. Accurate short-term traffic flow prediction also provides necessary conditions for the sustainable development of the traffic environment. Although the application of deep learning methods for traffic flow prediction has achieved good accuracy, the problem of combining multiple deep learning methods to improve the prediction accuracy of a single method still has a margin for in-depth research. In this article, a combined deep learning prediction (CDLP) model including two paralleled single deep learning models, CNN-LSTM-attention model and CNN-GRU-attention model, is established. In the model, a one-dimensional convolutional neural network (1DCNN) is used to extract traffic flow local trend features and RNN variants (LSTM and GRU) with attention mechanism are used to extract long temporal dependencies trend features. Moreover, a dynamic optimal weighted coefficient algorithm (DOWCA) is proposed to calculate the dynamic weights of CNN-LSTM-attention and CNN-GRU-attention with the goal of minimizing the sum of squared errors of the CDLP model. Then, the neuron number, loss function, optimization algorithm, and other parameters of the CDLP model are discussed and set through experiments. Finally, the training set and test set for the CDLP model are established through the processing of traffic flow data collected from the field. The CDLP model is trained and tested, and the prediction results of traffic flow are obtained and analyzed. It indicates that the CDLP model can fit the change trend of traffic flow very well and has better performance. Furthermore, under the same dataset, the results from the CDLP model are compared with baseline models. It is found that the CDLP model has higher prediction accuracy than baseline models. |
| format | Article |
| id | doaj-art-1f05d6bce829485a8c8d537c25ea02ea |
| institution | OA Journals |
| issn | 0197-6729 2042-3195 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Advanced Transportation |
| spelling | doaj-art-1f05d6bce829485a8c8d537c25ea02ea2025-08-20T02:04:44ZengWileyJournal of Advanced Transportation0197-67292042-31952021-01-01202110.1155/2021/99280739928073Short-Term Traffic Flow Prediction: A Method of Combined Deep LearningsChuanxiang Ren0Chunxu Chai1Changchang Yin2Haowei Ji3Xuezhen Cheng4Ge Gao5Heng Zhang6College of Transportation, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Transportation, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Transportation, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Transportation, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Transportation, Shandong University of Science and Technology, Qingdao 266590, ChinaShort-term traffic flow prediction can provide a basis for traffic management and support for travelers to make decisions. Accurate short-term traffic flow prediction also provides necessary conditions for the sustainable development of the traffic environment. Although the application of deep learning methods for traffic flow prediction has achieved good accuracy, the problem of combining multiple deep learning methods to improve the prediction accuracy of a single method still has a margin for in-depth research. In this article, a combined deep learning prediction (CDLP) model including two paralleled single deep learning models, CNN-LSTM-attention model and CNN-GRU-attention model, is established. In the model, a one-dimensional convolutional neural network (1DCNN) is used to extract traffic flow local trend features and RNN variants (LSTM and GRU) with attention mechanism are used to extract long temporal dependencies trend features. Moreover, a dynamic optimal weighted coefficient algorithm (DOWCA) is proposed to calculate the dynamic weights of CNN-LSTM-attention and CNN-GRU-attention with the goal of minimizing the sum of squared errors of the CDLP model. Then, the neuron number, loss function, optimization algorithm, and other parameters of the CDLP model are discussed and set through experiments. Finally, the training set and test set for the CDLP model are established through the processing of traffic flow data collected from the field. The CDLP model is trained and tested, and the prediction results of traffic flow are obtained and analyzed. It indicates that the CDLP model can fit the change trend of traffic flow very well and has better performance. Furthermore, under the same dataset, the results from the CDLP model are compared with baseline models. It is found that the CDLP model has higher prediction accuracy than baseline models.http://dx.doi.org/10.1155/2021/9928073 |
| spellingShingle | Chuanxiang Ren Chunxu Chai Changchang Yin Haowei Ji Xuezhen Cheng Ge Gao Heng Zhang Short-Term Traffic Flow Prediction: A Method of Combined Deep Learnings Journal of Advanced Transportation |
| title | Short-Term Traffic Flow Prediction: A Method of Combined Deep Learnings |
| title_full | Short-Term Traffic Flow Prediction: A Method of Combined Deep Learnings |
| title_fullStr | Short-Term Traffic Flow Prediction: A Method of Combined Deep Learnings |
| title_full_unstemmed | Short-Term Traffic Flow Prediction: A Method of Combined Deep Learnings |
| title_short | Short-Term Traffic Flow Prediction: A Method of Combined Deep Learnings |
| title_sort | short term traffic flow prediction a method of combined deep learnings |
| url | http://dx.doi.org/10.1155/2021/9928073 |
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