How to persuade my parents to allow me to travel alone?

My parents never let me run away from home since I was a child. They are always worried that such a danger will happen. Even I can't go to my uncle's house alone. If I want to go, they must stay with me.

As I get older, I want to go out alone more and more, but my parents always disagree. One day I couldn't help it, so I went to talk to my parents. I told my parents that I have grown up and I can't hide under their wings forever. I want to travel alone. I told my parents that if I always rely on them, I will never grow up and I will be untenable in the future society. Although I don't want to make my parents sad, I still told my parents that I would always have one.

I told them that because of their support, I couldn't do many things independently, but I was laughed at by my classmates. Of course I don't want to live like that anymore, that's all? My parents don't allow me to go out. I also prepared a perfect travel plan, and I told them that I would report their safety at every stop and let them send me to the station with tears in my eyes.