What is indicated by 10-40 in the 10 code system?

In the 10 code system used by law enforcement, 10-40 specifically signifies "Block Road at." This code is useful during situations that require an officer to communicate a need for road closure or obstruction to ensure safety or control traffic flow during emergency responses or investigations. This concise communication helps officers relay important information quickly without the need for lengthy explanations, which is critical in fast-paced situations.

The other options do not accurately represent the meaning of 10-40. Each alternative code pertains to different situations and requirements that are not captured by "Block Road at." Understanding the specific meanings of these codes promotes clear and effective communication among law enforcement personnel, enhancing coordination and operational efficiency.