Why can’t she drive?

I don't know whether this topic should be here or religion but it's about why women aren't allowed to drive. In Saudi Arabia a group of women protested against the law that limits womens' rights in that they were not allowed to drive. They took their family cars, later they were arrested.

so what is this? is it an islamic ruling or what? I read in a fatwa book that women aren't allowed to drive because it causes them to socialise more with the opposite sex. I'm not clear on how that works out, cos if youre catching a bus or walking you're by far more likely to run into lads than you are when driving from A to B. you're sat in your car on your own. on a bus a guy can be sat right next to you. strange world. i'm sure theres a better reason. i'll try n get the details of the book.