When driving a high-sided passenger bus across a long sea-crossing bridge or through a mountain valley where 'Crosswind' warning signs (横风标志) are posted, what is the proper operational procedure?

1. Firmly grip the steering wheel with both hands, decelerate smoothly, anticipate lateral aerodynamic deviation, and gently correct steering toward the upwind side without abrupt jerks
2. Accelerate to maximum speed to cut through the crosswind gust quickly
3. Slam on the brakes immediately upon feeling the vehicle sway laterally
4. Steer sharply toward the bridge guardrail to lean against the wind barrier