When driving on a road with no centerline, what must drivers do?

When driving on a road without a centerline, drivers must give at least half of the road to oncoming traffic. This rule is crucial for ensuring safety, as it helps maintain a safe distance between vehicles traveling in opposite directions. Without a centerline to guide positioning, keeping a large enough space allows for safe passage and reduces the risk of head-on collisions.

The other options do not address the primary concern of safe navigation on such roads. Staying completely to the right may not always be feasible or safe depending on road conditions, and driving slower than the speed limit does not necessarily enhance safety in this context. Additionally, waiting for other vehicles to pass may not be practical or efficient, especially when the road is intended for two-way traffic. Thus, the requirement to share the road equitably is the most important consideration.