Way back when (maybe 17 years ago?) I used to ride to school. It was probably about 3 miles. We were very poor, and dad needed the car for work. I remember mom and dad taking me on the route and pointing out the "safe houses" where I could go if I got scared. Don't remember what the program was called, but designated safe houses had a child sticker on the front window so kids could know they could go there... We rode the route a few times. I didn't have any bike repair supplies or a cell phone. But it was fun.

Might be a good idea to give her some options of what she can do if she starts to feel unsafe at any given point of the ride. Even though I never had to run to a safe house, I knew where it was in case I needed it. More than likely she won't need the options, but it wouldn't hurt.