If the left front zone is closed and the right front zone is open, lane position _____ would be a wise choice.

Choosing lane position three is a wise choice when the left front zone is closed while the right front zone remains open, as it optimally uses the available space and enhances safety.

Lane position three is typically on the right side of the lane, allowing the driver to take advantage of the open right front zone. This positioning ensures that there is a clear path for maneuvering without risking a collision in the left front zone, which is obstructed. It also provides better visibility and room for potential obstacles while maintaining a buffer from oncoming traffic or potential hazards in the left lane.

In contrast, lane position one is usually centered in the lane, which would not adequately respond to the closed left zone. Lane position two, which is slightly to the left of the lane center, would not capitalize on the open right front zone effectively. Lastly, lane position four, which is positioned further to the right, could put the vehicle closer to the edge of the road, potentially leading to issues such as a roadside hazard or being too close to the shoulder.

Thus, utilizing lane position three allows for effective maneuvering while ensuring a proper response to the current traffic and road environment.