So today when going in the outer lane, I noticed a new Volvo SUV in the middle lane to my left, the door mirror had small orange light at the top corner. the orange light would go on and off. At first I thought that it was the indicator, but none of the other indicators were signalling. As it looked like a quite new volvo SUV, suddlenly it dawned on me that it must have been a blind spot detection device.
But is there really a blind spot? it appears that you can see everything in front of the car and everything at the rear in the door mirror. So I got hooked on the idea; nothing better to do. The problem is how do you know that you can't see something that you can't see?
When in the middle lane, I checked a couple of cars passing on my right to see it they would dissapear in the door mirror at some point. They would certainly shrink to less than a metre such that only the front would be vissible. This means that a very short car such as the smartcar could be completely hidden in the blind spot. Or a motorbike, but they are usually noticed by their noise and weaving in and out.