Travel-time Prediction Using K-nearest Neighbor Method with Distance Metric of Correlation Coefficient

Table 1: Comparison of travel-time prediction methods.

Method	Advantage	Disadvantage
KF	Do not require large amount of historical data	Impossible to predict multiple-step-ahead travel times
ANN and TSA	Sophisticated and accurate	Do not consider changes in travel-time pattern
k-NN	Flexible to changes in travel-time pattern	Long time to execute