Driver Assistance: Automatic Collision Notification

Definition

Automatic collision notification (ACN) refers to a number of different OEM systems that are capable of calling for help after an accident has occurred. In the market there are many systems perform the same basic function such as OnStar , BMW Assist, Toyota’s Safety Connect, Ford’s 911 Assist. Since the driver and passengers of a vehicle may be incapacitated after an accident, these systems are typically capable of summoning emergency services if an operator determines it is necessary.

Work Principle

Although each automatic collision notification system has slightly different features, most of them are tied into a vehicle’s infotainment system. When specific events occur, such as a deployed airbag, the ACN will activate. In most cases, it will connect to an operator who will attempt to communicate with the driver or passengers. If that isn’t possible, the operator can contact emergency services and provide them with information about the accident.
In other cases, an ACN will place a call directly to emergency services after an accident occurs. Systems with this feature typically provide the driver or passenger an option to cancel the call in case it was activated accidentally.

The Development

Collision notification systems and services have been independently developed by a number of OEMs, but OnStar was one of the first commercially available products that allowed automatic communication with an operator via a CDMA cell phone connection.
Due to the large installation base and experience of OnStar in the field, the Centers for Disease Control (CDC) partnered with the GM subsidiary to create a basis for advanced automatic collision notification. The CDC convened an expert panel that analyzed crash telemetry, and they created a report that provides advice on how to use crash telemetry to determine the likely severity of injuries and, in turn, provide more effective emergency care.