Development and Validation of Improved Impedance Functions for Roads with Mixed Traffic Using Taxi GPS Trajectory Data and Simulation

Table 12

Comparison of the observed average travel time and the predicted travel time calculated from applying the calibrated impedance function on Jianshe Road.

Time period	Observed average travel time (s)	Predicted travel time (s)	Percentage error (%)
8:00–8:05	77.32	82.21	−6.33
8:05–8:10	83.70	86.31	−3.13
8:10–8:15	88.61	91.12	−2.94
8:15–8:20	91.50	95.34	−4.21
8:20–8:25	94.10	96.65	−2.71
8:25–8:30	92.36	93.42	−1.10
8:30–8:35	87.26	86.31	1.11
8:35–8:40	83.71	80.18	4.22
8:40–8:45	81.14	77.78	4.13
8:45–8:50	76.51	72.38	5.39
8:50–8:55	73.37	69.38	5.44
8:55–9:00	70.88	67.10	5.33