Which code would require all but emergency traffic to be held?

• A. Signal 60
• B. Signal 100
• C. 10-90
• D. Priority 1

Answer: (B)

The code that requires all but emergency traffic to be held is Signal 100. This code is typically used during critical incidents, such as a major emergency response or a serious incident where the information flow needs to be controlled to avoid congestion on communication channels. By holding non-emergency traffic, responders can ensure that vital communications related to the incident can be made without interference, allowing for a more efficient and effective emergency response.

The other options, while they may pertain to different scenarios or types of incidents, do not convey the specific directive to hold all non-emergency communications. For instance, Signal 60 often pertains to a specific type of emergency or operational directive, while the 10-90 code and Priority 1 may represent different levels of urgency or types of calls, but none explicitly require the cessation of non-emergency traffic like Signal 100 does.