AACN/VEDS Overview

Advanced Automatic Crash Notification (AACN) & Vehicular Emergency Data Set (VEDS)

The Vehicular Emergency Data Set (VEDS) provides useful and critical data elements and the schema set needed to facilitate an efficient emergency response to vehicular emergency incidents. The VEDS uses the Extensible Markup Language (XML) open standard and conforms to the National Information Exchange Model (NIEM) as a common data exchange format to provide a consistent method of data exchange. The intent of the VEDS document is to establish a uniform data set for the transmissions and collection of Advanced Automatic Collision Notification (AACN) data that will be used in data transfer pilots/demos by all Telematics Service Providers (TSPs) and target recipient agencies including 9-1-1 PSAP Safety Answering Points (PSAPs), emergency responders, and medical facilities capable of providing trauma level patient care. The analysis of the data collected will assist in identifying the efficiency and effectiveness of the dataset when used by pilot participants and whether further modifications to the VEDS are necessary.

The AACN Joint APCO/NENA Data Standardization Workgroup was formed at the request of two TSP companies to continue the work of the original ACN working group and the Comcare Alliance, and to specifically address the need for an open standard format to be used for all providers and consumers of Vehicle Telematics information. The VEDS is not a data transmission/protocol standard as several transport methods may exist to facilitate the transmission of the data. The working group was comprised of APCO and NENA staff members, 9-1-1 PSAP practitioners, staff representing multiple TSPs and vehicle manufacturers, National Highway Traffic and Safety Administration’s Office of Medical Services, and several other leaders who work in the public safety field.

Beyond basic notification of airbag deployment and GPS satellite-based location of the vehicle, AACN entails the aggregation of in-vehicle crash sensor data to better inform emergency responders prior to their arrival at the accident scene as to the potential severity of the crash and the likelihood of severe injuries to the vehicle’s occupants. AACN information was recently included in the federal guidelines for field triage of injured patients. These guidelines are designed to help responders at the accident scene identify the potential existence of severe internal injuries and to make critical decisions about how and where a patient needs to be transported. TSPs also are able to provide responders with a detailed description of the vehicle, emergency contacts provided by the vehicle owner and whether crash sensors indicate the vehicle was involved in a rollover, which may influence what kinds of resources are dispatched to the scene.

VEDS Schema (469.3 kB)

AACN & VEDS Resources