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Estimating Toll Road Travel Times Using Segment-Based Data Imputation

Author

Listed:
  • Krit Jedwanna

    (Department of Civil Engineering, Faculty of Engineering Rajamangala, University of Technology Phra Nakhon, Bangkok 10300, Thailand)

  • Chuthathip Athan

    (Mobinary Company Limited, Bangkok 10400, Thailand)

  • Saroch Boonsiripant

    (Department of Civil Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand)

Abstract

Efficient and sustainable transportation is crucial for addressing the environmental and social challenges associated with urban mobility. Accurate estimation of travel time plays a pivotal role in traffic management and trip planning. This study focused on leveraging machine learning models to enhance travel time estimation accuracy on toll roads under diverse traffic conditions. Two models were developed for travel time estimation under a variety of traffic conditions on the Don Muang Tollway, Bangkok, Thailand: a long short-term memory (LSTM) recurrent neural network model and a support vector regression (SVR) model. Missing data were treated using the proposed segment-based data imputation method. Unlike other studies, the effects of missing input data on the travel time model performance were also analyzed. Traffic parameters, such as speed and flow, along with other relevant parameters (time of day, day of the week, holiday indicators, and a missing data indicator), were fed into each model to estimate travel time on each of the four specific routes. The LSTM and SVR results had similar performance levels based on evaluating the all-day pooled data. However, the mean absolute percentage errors were lower for LSTM during peak periods, while SVR performed slightly better during off-peak periods. Additionally, LSTM coped substantially better than SVR with unusual traffic fluctuations. The sensitivity analysis of the missing input data in this study also revealed that the LSTM model was more robust to the high degree of missing data than the SVR model.

Suggested Citation

  • Krit Jedwanna & Chuthathip Athan & Saroch Boonsiripant, 2023. "Estimating Toll Road Travel Times Using Segment-Based Data Imputation," Sustainability, MDPI, vol. 15(17), pages 1-22, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:17:p:13042-:d:1228428
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    References listed on IDEAS

    as
    1. Huachun Tan & Yuankai Wu & Bin Cheng & Wuhong Wang & Bin Ran, 2014. "Robust Missing Traffic Flow Imputation Considering Nonnegativity and Road Capacity," Mathematical Problems in Engineering, Hindawi, vol. 2014, pages 1-8, March.
    2. Kai Liu & Meng-Ying Cui & Peng Cao & Jiang-Bo Wang, 2016. "Iterative Bayesian Estimation of Travel Times on Urban Arterials: Fusing Loop Detector and Probe Vehicle Data," PLOS ONE, Public Library of Science, vol. 11(6), pages 1-12, June.
    3. Krit Jedwanna & Saroch Boonsiripant, 2022. "Evaluation of Bluetooth Detectors in Travel Time Estimation," Sustainability, MDPI, vol. 14(8), pages 1-23, April.
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