On 02/03/2016 15:01, Martin Bonner wrote:

- The killer problem though is legacy. If I am driving towards you with
my new car with polarized headlamps, how do I know I don't need to dip
my headlamps?


Yes, but this was thought about soooo long ago, when there were far
fewer vehicles on the road. We shouldn't put off really good ideas
indefinitely.