Final answer:
When driving on a two-way road with no centerline markings, you must leave at least half the road for vehicles going in the opposite direction. This is known as the principle of sharing the road.
Step-by-step explanation:
The correct answer is option a. When driving on a two-way road with no centerline markings, you must leave at least half the road for vehicles going in the opposite direction. This is known as the principle of sharing the road. It allows for safe and efficient flow of traffic in both directions.
By leaving at least half the road, drivers can provide enough space for oncoming vehicles to pass comfortably. This ensures that both drivers have enough visibility and can maintain a safe distance from each other.
For example, if you are driving on a narrow two-way road without centerline markings, you should stay towards the right side of your lane to leave space for vehicles coming from the opposite direction. This way, you can safely share the road and avoid any potential collisions.