Strict parents!

I am 21 years old and I still feel like I am being controlled by my parents. My guy wanted to go to the beach for his bday. He was so excited! When I gave the news to my folks, they felt that the distance is too far and the drive is unsafe. I am trying to be understanding of their view points but I am furious. They tell me that being 21 doesn't mean I can just do whatever. *sigh* How can I make this work? Advice would be great!