I watched lots of 白バイand ぺとカー videos recently. Interesting けど, it also costs a lot of human resources. In China, there are cameras at every crossroads to automatically detect 信号違反 behaviors and their car number. You will definitely receive a message if you ignore the traffic lights. And accidents can be recorded properly. I still remember seeing a 掲示板 when I was in Tokyo, asking people to provide information of an unsolved fatal accident even 2 years ago! So why not just deploy more 防犯カメラs?