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Table 3 Results of bibliographic source clustering

From: Feature selection and extraction in spatiotemporal traffic forecasting: a systematic literature review

Cluster 1 2 3
Average silhouette width 0,517 0,512 0,530
Cluster size 176 143 74
Clustering variables
 Spatiotemporal model Top 1 STARIMA FFNN FFNN
Top 2 BN VAR KNN
Top 3 SVR TDNN DL/ARDL
Top 4 VAR RNN SVR
 Topological structure Top 1 Network Sequential freeway Sequential arterial
 Number of links Median 26 7 4
 Conventionally referred as   Statistical models for a network topology of medium size ANN for freeways with small number of links Various models for arterial roads with small number of links
Target variables
 Year Median 2015 2011 2014
 Spatial FSE Top 1 CCF Up/downstream Up/downstream
Top 2 Upstream Upstream All
Top 3 PCA All Upstream
 Temporal FSE Top 1 Predefined Predefined Predefined
Top 2 CCF Empirical Empirical
Top 3 Empirical CCF CCF