Modern electric cars are superior at keeping their occupants cool in summer traffic jams, according to a test by Germany’s large ADAC motoring organisation. The trial was held using a new climate chamber which simulates a traffic jam in the summer heat. Engineers created a typical summer day for eight hours, including a temperature rise of up to 35 degrees Celsius and varying degrees of sunlight from powerful UV lamps. The test Tesla had a battery charge level of 60% at the start of the session. The air conditioning was set to a constant 20 degrees Celsius and the vehicle was operated in “camp…