Table 1 Advantages and limitations of the existing works.

From: Intelligent traffic congestion forecasting using BiLSTM and adaptive secretary bird optimizer for sustainable urban transportation

References

Methods

Advantages

Limitations

Wu et al.15

CNN with LSTM

Improved the system’s accuracy in forecasting traffic congestion

Harder to interpret and explain decisions

Chen et al.16

EMD with LSTM

Combining EMD for pre-processing and LSTM for temporal analysis leads to improved congestion prediction accuracy

Requires expertise in both time-series decomposition techniques

Wang et al.17

DG-CGRU

Focus on the most relevant spatial and temporal features

Require extensive hyperparameter tuning

Bai et al.18

CNN with LSTM

Scalable and versatile model

Increases the model’s complexity

Majumdar et al.19

Univariate and multi-variate lstms

Can handle complex, and large-scale traffic network

Needs large volumes of high-quality

Alsubaiet al.20

CNN with LSTM- IAO

By optimizing traffic flow and reducing congestion, sustainability in smart cities was promoted

Sensitivity to Parameter Initialization

Chen et al.21

DBN

Better at capturing complex patterns in large datasets,

Heavily reliant on the availability of high-quality

Ata et al.22

ABPN

Can adjust and refine their performance over time

May overfit to historical traffic data

Zhai et al.23

Bilstm

Handles non-linear relationships in traffic data

Difficult in areas with limited technological infrastructure

Elfar et al.24

Three ML models

Provided accurate short-term congestion predictions

High Computational Costs

Mohanty et al.43

Graph-CNN-LSTM

Can capture complex temporal and spatial relationships

Require significant computational resources