Influencing Factors on Vehicles Lateral Stability on Tunnel Section in Mountainous Expressway under Strong Wind: A Case of Xi-Han Highway

Table 7

Wind scale setting.

Wind scale	Original speed (km/h)	Expedite speed (km/h)
Level 5 (29∼38 km/h)	30	40
Level 6 (39∼49 km/h)	40	52
Level 7 (50∼61 km/h)	52	67.6
Level 8 (62∼74 km/h)	62	80.6
Level 9 (75∼88 km/h)	75	97.5