An Improved Car-Following Speed Model considering Speed of the Lead Vehicle, Vehicle Spacing, and Driver’s Sensitivity to Them

Table 7

Summary of model evaluation criteria.

Model evaluation criterion	Description	Conclusion
Mean square errors		The smaller the MSE, the better the model predictivity
Root mean square errors		The smaller the RMSE, the better the model predictivity
Equal coefficient		EC ranges between 0 and 1, and an EC value of 0.9 or above generally indicates a good fit

Note. is the i^th predicted car-following speed, is the i^th field speed measurement, and is the total number of data points ( = 1, 2, …, ).