The study, conducted by for the U.K.'s Department of Transport, concludes that extending trailers also wouldn't compromise safety:
"The consultation proposes allowing a 2-meter (6.6-foot) increase in the total length of articulated trucks operating within the existing weight limit of 44 tonnes. This would take the maximum permitted length of an articulated truck to 18.75 meters (61.5 feet) but would not allow any increase in overall weight. The Department for Transport estimates that this move could increase capacity for hauliers transporting lightweight goods by up to 13% and cut carbon emissions by around one hundred thousand tonnes each year."
Thanks to AutoBlogGreen