What should you do if you notice a vehicle doing a sudden lane change in adverse weather conditions?

In adverse weather conditions, such as rain, snow, or fog, visibility and traction are often reduced, making driving more challenging and increasing the likelihood of accidents. If you see a vehicle making a sudden lane change, it could indicate that the driver is losing control or is not fully aware of their surroundings. By slowing down, you increase your reaction time and create a safer distance between your vehicle and the one that might be acting unpredictably. This gives you the opportunity to assess the situation, make appropriate adjustments, and avoid a potential collision.

Maintaining your speed in these conditions could present a risk, as the unpredictable actions of other drivers could lead to a dangerous situation. Similarly, speeding up to pass or using your horn, while potentially tempting, would not be advisable as it could further escalate the situation or cause confusion for other drivers who may already be struggling with visibility or control.