What does 10-40 indicate?

The code 10-40 refers specifically to a "Silent run." This term is used in law enforcement to indicate that an officer is responding to a situation where they need to maintain discretion and avoid drawing attention, often when they are approaching a potentially dangerous or sensitive situation.

In practice, this could mean turning off sirens and flashing lights while traveling to the scene so as not to alert suspects or compromise the safety of officers and the public. Understanding this code is crucial for ensuring proper communication and operational effectiveness during certain policing scenarios.