Earlier this year, Amazon revealed plans to install high-tech surveillance cameras in its fleet of delivery vans that are now ubiquitous in neighborhoods across the United States. The cameras watch drivers as well as the road and provide real-time audio feedback. While many of these drivers work in Amazon Prime–branded vehicles, they are not Amazon employees, but rather are employed by third-party contractors called delivery-service partners (DSPs) — an arrangement that, among other benefits, limits Amazon’s liability when accidents occur.

The surveillance technology comes from Netradyne, a California-based company that uses cameras to analyze driver activity so as to provide instant direction (“please slow down,” for instance) while also storing that data to evaluate performance in line with company metrics. In a video about Driveri, Netradyne’s platform, Karolina Haraldsdottir, a senior manager of the last-mile delivery operation at Amazon, emphasizes that the cameras are meant as a safety measure, intended to reduce collisions.

The company has cited a pilot roll-out of the cameras from last year, which they say saw accidents drop by 48 percent. The installation of Driveri is in keeping with Amazon’s roll-out of similar camera monitoring among its long-haul trucking operation.