Therefore, built - in navigation and dedicated portable navigation systems still have the edge. (tomsguide.com)
The introduction of consumer - grade portable navigation systems have helped drivers get to their destinations easier than before, but the very devices that have helped them are now being used by Dutch police officers to determine locations where drivers speed. (automobilemag.com)
Of course, with portable navigation systems plummeting in price, you have to wonder how much longer new - car customers will be willing to pay for them as factory equipment. (articles.orlandosentinel.com)