While this could prevent some of the accidents, I'm not sure if the sum effect would be better. Allow me to explain: According to Google, the average cycling s

While this could prevent some of the accidents, I'm not sure if the sum effect would be better. Allow me to explain: According to Google, the average cycling speed is 15.5km/h and the average car length is 4.5m. Surely these will differ a lot from area to area, but they're good for a ballpark measure. This means it takes a cyclist about one second (4.5m / 15.5kmh = 1.05s) to pass a parked car. Even if you have a car with sensors, if the cyclist is out of your sensors' reach (behind the corner of the previous car), once you open your door, that one second will not be enough for the cyclist to either stop or change course. What might happen, however, is having sensors could lead to more reckless behavior along the lines of "why do I need to look, I have sensors?".