Volvo and a handful of other companies are testing a system known as SARTRE (Safe Road Trains For The Environment) which would allow commuters to line up behind a lead vehicle and create an autonomous train, well autonomous for everyone but the lead vehicle. The benefits are said to be environmental, in safety, and in productivity / time savings as the riders in the trailing cars can leave the driving in the hands of the lead vehicle's operator and focus on other tasks.
I'm in awe of the technological achievements displayed in the following video, and at the same time have a bunch of questions and concerns, many of which the researchers are already considering as demonstrated.
