We are planning with friends to go on a road trip this summer. They're all over 18 already, but I'll only be 17. I was wondering if I needed some kind of authorization. Thanks.
Nope, as long as you dont leave the country. Just bring your drivers liscence or state ID, but even that is not necessary.
A minor can travel wherever he/she wants in the USA.
Yes, you are free to travel. Kids are placed on planes by themselves all the time, (with flight attendets watching them), so i don't see why it would be a problem. Just take some ID with you. and have a good vacation!