My friend... has a daughter like that. Well 2 actually because they are twins... they are very nice good responsible girls... but very very pretty and everyone looks at them. It is creepy. And, they are not the most street smart young girls. My friend gets scared too... because, once, a bunch of guys stopped on the street her daughter was walking on and offered her a ride and REALLY tried to get her daughter in the car. Her daughter just thought they were joking, being friendly. Um, yah.... right. Anyway, luckily nothing happened to her... if you know what I mean.
For her and her girls... they have strict rules... after-all, they are only 16. The human brain is not even fully developed until 26 years old.
Anyway, the girls can only use the car for driving themselves to and from lessons, for their brother, for doing errands. The girls are fine with that. And, they are taught, real life scenarios about what can happen.... and what to do if in trouble etc., get a blue-tooth speaker thing for the car so she can talk/use the phone without taking her hands off the steering wheel etc.,
Just prep, prep, prep your daughter for things... and perhaps even practice it with her... or send her to driving lessons/self-defense classes. Teach her how to always look for an exit/an escape in any place she is at... how to kick out the tail lights of a car trunk if she is ever in one etc. Any safety thing that can be practiced.
I will probably go nuts-o when my girl starts driving too.... Egad!
Anyway... start with rules. And your gut instinct. Gradually, perhaps per year.. she can earn further flexibility with car use and places she is allowed to drive to etc.
All the best,
Susan