The sunlight would change, making a yellow line look different at noon from the way it did at dawn. Would the app interpret that break in the line as a parked car, and signal the runner to stop? Panek tested the technology for months over short distances, slowly gaining confidence, learning to trust the directional messages in his ears. But he adeptly compensates, following a voice and picking up on people’s unique sounds, looking toward them as he talks. And then, about a minute in, the voice in Panek’s headset — as well as everyone around him — told him to stop.

Source: New York Times December 22, 2020 15:11 UTC