1970: A Motoring Year in 5 Images Britain’s highest motorway, the M62 around J22, opened. The M62 also featured the first section of heated road surface in Britain and is part of the unsigned Euro-route E20 Shannon to Petersburg. Triumph Dolomite was launched. Britain’s first double mini roundabout was installed at Upton Cross in Dorset. The HGV test became compulsory for drivers of heavy good vehicles in Britain.