Melalvai, I bet your daughter will do fine. I agree there are some dicey areas out there but if she's staying off the section between Bethel and Nifong she should be fine. Where will she cross Providence? Hopefully she will remember everything you and her very good cycling instructors taught her.
As far as the cell phone, I probably would get her one. We've wished that we had one on occasion for our 11 year old although we are opposed to her having one all the time. We've about decided to get a "go-phone" that we keep and only give to her when she needs it. She won't be allowed to carry it all the time like 99% of her friends! I haven't quite convinced myself that it's not a waste of money but on the other hand the peace of mind will be worth it.