# Evaluation of Urban Transportation Resilience under Extreme Weather Events
## 5 Results
### Comparison between Different Subareas under the Yellow Rainstorm Warning  
The curves of the transportation performance in the Cangshan, Gulou, and Jinan subareas during the yellow rainstorm warning are shown in Figure 11a-c. The rainstorm began at 23:00, 2 May 2018, as seen in Figure 11a-c. The perturbation of the transportation performance in the Cangshan and Gulou subareas began at 0:30, 3 May, and 23:30, 2 May, and the disruption phase lasted for 4 h 30 min and 10 h 15 min, respectively. The transportation performance curve in the Jinan subarea began to show a downward tendency at 0:05, 3 May, and this trend lasted for 1 h 10 min. The perturbation in the Cangshan, Gulou, and Jinan subareas reached the lowest point around 5:00, 9:45, and 1:15, 3 May, with the lowest point being 0.77, 0.82, and 0.53, respectively. Then, the transportation performance in the Cangshan, Gulou, and Jinan subareas recovered gradually, returning to stability at 10:05,  
Figure 11: Curve showing transportation performance during the yellow and red rainstorm warning in Cangshan, Gulou, and Jinan subareas of Fuzhou. The left side shows the transportation performance curve in the Cangshan, Gulou, and Jinan subareas of Fuzhou during the yellow rainstorm warning, and the right side shows the transportation performance curve in the Cangshan, Gulou, and Jinan subareas of Fuzhou during the red rainstorm warning. 11:15, and 11:30, 3 May, and this recovery phase lasted for 5 h 5 min, 1 h 30 min, and 10 h 15 min, respectively. The rainstorm temporarily stopped between 6:00 and 7:00, 3 May, after which the Cangshan, Gulou, and Jinan subareas experienced more precipitation until it ended at 12:00. The curves of the transportation performance in the Cangshan and Gulou subareas oscillated significantly, exhibiting a W-shape from 0:30 to 5:00, May 3, and 23:30, 2 May, to 11:15, 3 May, respectively. The curves of the transportation performance in the Jinan subarea showed a V-shape from 0:05 to 3:00, 3 May. After that, it oscillated significantly, exhibiting a W-shape. Even though the new round of precipitation occurred during the morning rush hour, there was no significant impact on transportation in the Cangshan, Gulou, and Jinan subareas due to the small amount of precipitation. According to Table 2, the duration of the transportation performance perturbation in the Cangshan, Gulou, and Jinan subareas during the yellow rainstorm warning was obtained as 9 h 35 min, 11 h 45 min, and 11 h 25 min, respectively. Based on the curves of the transportation performance in the Cangshan, Gulou, and Jinan subareas during the yellow rainstorm warning and Equations (5)-(7), the values of \(k_{d}\), \(k_{r}\), and R were \(-\)0.04, 0.035, and 0.93 in the Cangshan subarea; the values of \(k_{d}\), \(k_{r}\), and R were \(-\)0.013, 0.087, and 0.95 in the Gulou subarea; the values of \(k_{d}\), \(k_{r}\), and R were \(-\)0.36, 0.041, and 0.86 in the Jinan subarea, respectively. The following conclusions can be drawn during the yellow rainstorm warning by comparing the transportation performance curves and evaluation results in the Cangshan, Gulou, and Jinan subareas. First, according to Table 2, it can be seen that the lowest points of the perturbation in the Cangshan, Gulou, and Jinan subareas were 0.77, 0.82, and 0.53; the slope of the disruption phase was \(-\)0.04, \(-\)0.013, and \(-\)0.36; the recovery time was 5 h 5 min, 1 h 30 min, and 10 h 15 min; and the transportation resilience was 0.93, 0.95, and 0.86, respectively. This indicates that the transportation performance in the Jinan subarea had the largest decline, the fastest disruption speed and the longest recovery time, and the lowest transportation resilience. The foremost reason for this was the high topography in the northern part of the Jinan subarea and the low topography in the southern part. Waterlogging can easily occur in Dengyun Road, Helin Road, and Chongan Road in the southern part of the Jinan subarea based on the government report.