Tests ran Tuesday night into Wednesday morning on the brake system of the tram involved in an accident in the Moldavian city of Iasi showed the system operates normally, which leaves human error as the only option, according to Mediafax. “We have pressed the brakes successively at 30, 40 and 55 kms an hour, and no malfunction was noted. It becomes clear the tram brakes operated as they should. The question is, what made the tram drives press them so late at the time of the accident,” Radu Gaiginschi, a professor at the “Gheorghe Asachi” Technical University of Iasi and a member of the expert commission assigned to look into the accident, said. One person died and five more were injured in Monday afternoon’s accident. The tram driver, 35-year-old Cristi Diaconu, has been charged with involuntary manslaughter.