and to detroit right now is carsten phenomenal correspondent carson ventura all of this actually become reality what are the main challenges. i think the biggest challenge is the trust of all there if people in that technology i mean we all know that computer is helpful and necessary but we also know how frustrating it is when they fail when the technology doesn't work and of course if you have a car that is driven by a computer that is even more important now i sometimes get nervous when i'm on the road and there's a big truck with the driver coming behind me but now imagine this coming from behind and you see that in your rearview mirror that's clearly no driver that's just as big machine coming here and i have no idea how that is supposed to work properly and safely but thank god there is someone who can rob it followed is here the co-founder and c.e.o. of enron it's a swedish company that developed this truck so how does this work without the droid it's actually a combination of different techniques this is cell phone technology and remote so we actually using different later system