let's talk with erik coelingh, he works for volvo in sweden. erik, what is the purpose of this? what are the advantages? > > when we started this project, we thought the main benefits would be that automated vehicles, self-driving vehicles, would be really safe and we thought we could save fuel. but we also learned, the more we worked with the project, the more time spent in the vehicles, the biggest benefit is really that you can do something else while commuting to work, or while being in your car. > > going 55, 65 mi. per hour with a platoon of other cars, bumper-to-bumper, i let go of the steering wheel. convince me that it is safe. > > it is safe. we have chosen to have a road train with a lead vehicle which is driven by a professional train driver. so, that minimizes the risk of making mistakes. and then this driver, he or she is supported by automated safety technologies as well, in order to avoid collisions. but even in case something does happen with the lead vehicle, we have so- called vehicle-to-vehicle communication in between the vehicles, so that we can detect if s