The slight downside to nav-systems is that they don't, as a general matter, have nice features like 'I just stopped being chased, going to the nearest exit would be stupid' and have stupid features like 'getting car directions while in the Ork Underground that take me mostly above ground.' Which doesn't matter too much, because with a map she could find other ways out.<br/><br/>Now, if the matrix reception were just a bit better it would be faster.  Or if whoever was in the car would have had the decency to give up sooner. Or if she'd wound up closer to one of the edges of the Underground. As it was she was lucky that nobody had come by yet. And at least as of the map coming up and Harper, that still held.  Harper wasn't the most up to date on where Adrian and his boys (or the boys of the guy he worked for) stopped considering things their's, but from the lay of the map she had a clear shot to a place she knew was.<br/><br/>There were also a few closer exits, but there was no telling who was watching them. And, of course, there were the big public exits.