as cool as it is, this concept scares me to death. 
"...A convoy of self-driving cars has taken to a public motorway in Spain in normal traffic, a world first, according to Swedish car maker Volvo.A professional driver took the lead of the convoy in a truck, and was followed by four self-driven Volvo vehicles: a second truck and three cars, Volvo said in a statement......The cars successfully drove for 200 kilometers (124 miles) on May 22 along a motorway outside Spain's northeastern city of Barcelona, a Volvo spokesman said...."
http://news.discovery.com/autos/volvo-s ... 20530.html