This post was contributed by Sebastian Blanco, editor in chief of AutoblogGreen. Jim Motavalli is on a month-long assignment. 

Right now, it's a bad idea (and often illegal) to do things like check e-mail or text while driving. That doesn't stop a lot of people from doing it anyway, and that's why technology like Project Sartre's "road train" concept is a really good idea.

It's still in the early stages, but the system can cut emissions and give "drivers" time to do other things instead of paying attention to the road. Check out the video above of a single Volvo S60 sedan that's following the lead vehicle with no input from the driver — and dream of a day when you, too, can enjoy sleeping on your way to work.

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Jim Motavalli ( @jmotavalli ) writes about cars, technology and the environmental world to anyone curious enough to ask.

Waiting for the day when you can safely check Facebook and drive at the same time?
The "road train" concept works, but more testing will be required.