What does "prima facie" mean in the context of speed laws?

In the context of speed laws, "prima facie" refers to something that is assumed to be true at first glance, based on initial evidence. When applied to speed laws, it often means that there is a presumed violation of the speed limit if a driver is caught going a certain speed. For example, if the speed limit is 55 mph and a driver is recorded traveling at 65 mph, that can be considered a prima facie violation of the law. This principle establishes a baseline for law enforcement; they can assume that the speed recorded indicates a lawful breach until proven otherwise by the driver.

This understanding is crucial for both law enforcement officers and drivers. It sets a standard by which speed can be judged, establishing that certain speeds are inherently unlawful unless there is sufficient reason to justify them, such as an emergency situation. Other choices do not capture this initial assumption of truth contrary to the implications of "prima facie."