When should a permit driver drive on the interstate for the first time?

I got my learners permit a little over a week ago because I had just turned 15. Anyway, my mom thinks I need more experience before driving on the interstate. I live in Missouri and I'll have my permit for a year until I can get my license. I have to have a total of 40 hours of driving (10 hours at night) I

I got my learners permit a little over a week ago because I had just turned 15. Anyway, my mom thinks I need more experience before driving on the interstate. I live in Missouri and I'll have my permit for a year until I can get my license. I have to have a total of 40 hours of driving (10 hours at night) I just wanted to get more opinions of when I should be allowed to drive on the interstate for the first time. Thanks.

Btw I have over 2 hours of experience so far if that helps any. I've driven on a two lane highway, but not an interstate.

Best Answer:

Jenna: TWO whole hours WOW that is a lot. Suggest you give yourself a few more before you hit the Interstate.

Suggest your Mother will decide when you are ready. It might be 20 hours it could be 10 or 30. Depends on the STUDENT. Some learn better than others.

Do it right and with confidence and Mom will let you at it when YOU are ready. There is no law that says you cannot have MORE than 40 hours training.

Get some practice in BAD weather too. Have mom take you to the next town for example. You should practise on roads you DO NOT know as well. You should be learning how to read the signs and do whatever at any road in any town.
You might get some Interstate practise coming home if you do it right.

Other answer:

Jenna:
Matters not our opinion, Mom holds that key. If I were training you, it would not be for 20 hours or so, and you'd be getting well over 50 hours before you took the driving test.
Mr.357:
Interstates are much easier than surface streets that have sharp turns and traffic lights. I would have gone for it at least 1.5 hours ago.
bonehead:
a permit driver should drive on the interstate for the first time at rush hour during a heavy rain or snow storm and only while on heavy medication.