In which situation is it acceptable to 'Drive to the left of center'?

Driving to the left of center is primarily acceptable when overtaking slow-moving traffic. This allows drivers to safely pass vehicles that are traveling at significantly lower speeds than the flow of traffic. It is essential for safety that such overtaking occurs only when it is permissible and safe to do so, which means there should be a clear line of sight and no oncoming traffic.

In this scenario, overtaking on the left ensures that the driver maintains a safe distance from other vehicles and navigates around obstacles effectively, adhering to traffic laws that protect both the overtaking vehicle and those being overtaken.

The context of the other options clarifies when driving to the left might be restricted. For instance, doing so in no-passing zones is typically prohibited due to safety concerns, while driving during bad weather conditions generally calls for increased caution and adherence to speed limits without the necessity of changing lanes unless absolutely necessary. On one-way streets, while it might seem logical to drive to the left of the center, this scenario typically applies to specific traffic layouts rather than a general guideline for overtaking and may not universally apply as safely or legally as necessary.