Final answer:
When driving on a road that is not a freeway, drivers should look down the road at least 12 seconds ahead of their vehicle, using the 12-second rule.
Step-by-step explanation:
When driving on a road that is not a freeway, drivers should look down the road at least 12 seconds ahead of their vehicle. This is a rule of thumb known as the 12-second rule. It allows drivers to have enough time to react to any potential hazards or obstacles on the road. For example, if a car were to suddenly brake or a pedestrian were to step into the road, having a 12-second visual lead time would give the driver enough time to safely respond and take necessary actions.