--- 2008年4月闯红灯被拍,确定是红灯,绝不是黄灯,直到现在也没有收到罚单或任何信,难道要自首吗?会不会很多年之后我就欠一大笔?你们都是过多久收到的信?
No worry there could not 很多年之后我就欠一大笔. I got one parking ticket after 14 days. So long time you haven't received 罚单或任何信, I think no this letter will come if you did not change address.
On the other side, you should know you got a police ticket or not by you renew your car insurance -- if you got a police ticket in last three years, your insurance would be increased a lots. So, if your insurance increased, call your insurance company and ask is it related a police ticket, ask them in detail of when, what reason, etc. You will find your answer and have a good sleep.
By a way, for the last step, if you are sure and find you got a police ticket but not received any letter for it. Go to a police station and ask them how to do (no need say 自首 as you wrote). Police could nice to help you and tell you how to do.