What type of speed law sets a specific speed limit that is always in effect regardless of environmental conditions?

The correct choice is the Absolute Speed Law. This type of law establishes a specific speed limit that motorists must adhere to at all times, irrespective of environmental factors such as weather conditions, traffic volume, or road construction. The key characteristic of Absolute Speed Law is that if a driver exceeds the posted speed limit, they are in violation of the law, and this violation can be enforced without any consideration of the surrounding circumstances.

This clear and objective nature of Absolute Speed Law simplifies enforcement since law enforcement officers do not need to evaluate whether the driver was operating at a safe speed under the conditions; the mere act of exceeding the speed limit constitutes a violation.

In contrast, other types of speed laws, such as Basic Speed Law, require an assessment of whether the speed is reasonable and prudent given the current circumstances, which can lead to more subjective interpretations. Conditional Speed Laws are tied to specific conditions or situations, and Adjustable Speed Laws may imply that the speed limit can change based on various factors, again lacking the unwavering aspect of the Absolute Speed Law. Thus, Absolute Speed Law stands out for its clarity and strict enforcement capability.