Y'know I've pondered that, maybe it was the glare? The sun was rising, but not low as there are hills. Here's a screenshot of the intersection from the car's point of view (and this just made me realize the car had a stop sign, I thought it was a yield like on the other side). I was coming from the right/south riding to the left/north (the orange arrow) on the furthest lane (we drive on the right side here). I painted where the sun position was at the time, from what I recall. Driver was crossing a 4 lane avenue (2 lanes each way) heading east.
Captura de pantalla 2017-06-05 a las 10.05.31.jpg