On an unmarked two-lane road, you may pass a slow-moving vehicle on what side if there are no signs prohibiting passing?

On an unmarked two-lane road, passing a slow-moving vehicle is typically done on the left side. This is standard driving practice in the United States and ensures the safety of all road users. The left lane is designated for overtaking slower vehicles, allowing drivers to maintain better visibility of oncoming traffic while doing so.

Passing on the left also helps prevent potential accidents that could arise from passing on the right, where drivers may not expect a vehicle to overtake them. The left side creates a clear and predictable path for both the overtaking driver and the vehicle being passed, reinforcing safe driving habits.

In contrast, passing on the right is generally discouraged unless in specific situations, such as when the vehicle in front is turning left, or there are multiple lanes in the same direction, which is usually clearly marked. Passing in the middle or on the shoulder can lead to dangerous situations as these areas are not designated for overtaking, and it may confuse other drivers about your intentions. Therefore, the left side is the proper and safest choice when overtaking a slow-moving vehicle on an unmarked two-lane road.