ACD

Synonyms: In the past ACD Codes have been referred to as "ANSI-D20 Codes" and "AAMVA Violation Exchange Codes".

The AAMVA Code Dictionary (ACD) is a set of codes used to identify:

• The type of driver conviction, or
• The reason for a driver withdrawal

See the AAMVA Code Dictionary (ACD) Manual for the list of the codes and their usage.

Usage Note: Individual jurisdictions may or may not use ACD codes within their systems but all jurisdictions use the ACD codes when communicating offense data with each other.

Without ACD every jurisdiction would need to understand the native convictions of every other jurisdiction. With ACD a jurisdiction only needs to know their own convictions and the comparable conviction in ACD. So ACD serves as a common language for exchanging conviction and withdrawals.

Example: For an offense of "Speeding, 16-20 mph over speed limit"

Jurisdictions do not need to know all the native state codes (LA:449, OR:S16, VA:B46.2-870, etc.) used in other jurisdictions. They only need to convert conviction codes between their native code and ACD (S16).