Yeah, she's quite lucky. If she had been a 1/2 second faster, or the sign had been a 1/2 second slower falling, the way it hit the road in front of her, it would have cut that car in two, and possibly her with it.
A local preacher in my town was driving on the highway leaving town and as he passed under a large tree a huge branch broke off and crushed his car. You couldn't plan it to happen if you tried, he was just at the wrong place and time.