How far can stationary RADAR be from warning signs in a city?

The correct answer indicates that stationary RADAR can be positioned up to 300 feet away from warning signs in a city. This distance is significant because it helps ensure that drivers have adequate notice of the speed enforcement measures in place. The 300-foot guideline serves to balance the need for effective enforcement with the importance of driver awareness and safety.

When RADAR units are placed within this range, they can effectively monitor vehicle speeds while ensuring that motorists are sufficiently warned about the presence of speed enforcement. This distance promotes compliance with speed regulations by allowing drivers ample opportunity to adjust their speed appropriately before passing the enforcement area.

The other options suggest distances that either exceed practical limits or may not result in effective enforcement outcomes. Distances greater than 300 feet could diminish driver acknowledgement of the warning signs, potentially impacting the speed reduction objectives of using RADAR enforcement.