What aspect of the driver's decision to pass must be continually reevaluated?

The aspect of the driver's decision to pass that must be continually reevaluated is safety. When considering passing another vehicle, a driver needs to assess the situation constantly to ensure that it is safe to do so. This includes looking at the speed of oncoming traffic, the distance between vehicles, road conditions, visibility, and any relevant laws. Safety is paramount because a passing maneuver can introduce higher risks of collision if the driver misjudges these factors. The need to reevaluate safety helps to ensure that the maneuver does not endanger the driver, passengers, or others on the road, thereby promoting responsible driving behavior and accident prevention.

While speed, time, and distance are important considerations in the passing decision, the overarching concern is whether the entire maneuver can be executed safely. This overarching concern with safety dictates how the other factors are considered and adjusted throughout the process.