may be right.. well i didn't checked those ahadiths.. but as much i read, i came to know that a woman should not go out with a mehram, but in case of some emergency.

well another thing in my mind about saudia is that may be the govt. is afraid of giving permission now, since the kept them always below now giving directly such an order that girls are allowed to drive alone can lead to a lot of problems. so may be they just want to avoid this..