Fully self-driving vehicles are still many years away but already, we're starting to see some autonomous driving features creep into modern vehicles in the name of convenience and / or safety.

It's a trend that's only going to accelerate moving forward as the National Highway Transportation Safety Administration (NHTSA) and the Insurance Institute for Highway Safety (IIHS) on Thursday said 20 automakers - representing nearly the entire US auto market - have agreed to make automatic emergency braking (AEB) a standard feature on cars and light-duty trucks by September 1, 2022.

Trucks with gross weights between 8,501 and 10,000 pounds are expected to be equipped with AEB systems three years later in 2025.

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As the name suggests, AEB systems are designed to slow or stop a vehicle if it detects a collision with another vehicle, a pedestrian or other object is imminent.

AEB systems are already utilized on several modern vehicles. As The Verge correctly points out, the feature first started showing up on high-end luxury vehicles more than a decade ago. As the technology became more refined and cheaper to implement over the years, we've seen it make its way into mainstream markets from a variety of automakers.

It's worth clarifying the fact that this is simply an agreement with automakers, not a rule or law. According to the NHTSA, going the route of an agreement will see the feature rolled out up to three years sooner versus a trip down the regulatory road.