Sixteen people were injured in the early hours of Friday in an accident involving a bus on a major German motorway that links the cities of Hamburg and Berlin, the police said. Police said that the coach left the northern Polish city of Gdańsk carrying about 60 passengers. It veered off the road between Hamburg and Berlin, colliding with the central crash barrier and a traffic sign. The coach crashed “presumably due to carelessness,” a police spokesman said. The impact caused several windows on the left side of the bus to shatter. Sixteen passengers sustained facial injuries from the broken gl…