Researchers hope to make texting by voice a safe alternative

Seriously? No definitive answer why? How about: It's more efficient than voice and dispenses with a lot of the friendly handshaking involved in making a call.Texting is less disruptive and all-consuming of attention, and is more easily interleaved into the course of a day. That is, if you're not doing anything that doesn't need constant visual attention. Like, you know, driving.