NEDO's been working on the idea for a while, demonstrating a three-car convey with each car travelling about 15 meters apart (about 50 feet) in 2010. Three years later, the organization's four-car caravan is far more efficient. Japanese broadcaster NHK reports that the plan could reduce the vehicles' fuel consumption by up to 15 percent.
This is combining the road train technology that Europe has worked on in the SARTRE program.
SOURCES - NHK, The Verge, Youtube
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