GPS with text-to-speech functionality

Nowadays, any in-car GPS device can give you voice-guided directions, but there's a new enhancement to this feature that's starting to show up in the latest systems: text-to-speech functionality. This enables the GPS unit to speak specific street names, rather than generic directions. For example, it will say, "Turn right on Main Street," rather than "Turn right in 100 feet." Now, perhaps you're thinking that this isn't the biggest thing to happen to in-car GPS, but text-to-speech directions are beneficial for a couple of reasons. Not only is it a great navigation aid, it also allows you keep your eyes safely on the road instead of on the system's screen. Here are six models equipped with this functionality; read our reviews to see if one is right for you.