Starting in the late 90's people started having access to navigation systems in their vehicles, which allowed them to plot out a route and ditch the map for good. The problem with these early systems is that they relied on fixed data, generally DVD's. The DVD's are now gone in favor of hard drives that can be updated, but most of the information still lags reality.
Smart GPS is now here. The easiest way to get it for most is to just use your cell phone, provided that your carrier offers GPS. For example, my carrier Sprint offers free GPS to anyone on an unlimited data plan. Smart GPS tells you when the HOV lane is open or closed, and whether there's a traffic jam up ahead. It automatically reroutes you if there is construction, and knows about new roads as soon as they are built.
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