A young couple died yesterday when their speeding car ploughed into a crash barrier and launched itself into the air near Sai Kung. Decorator Chow Chun-wai, 25, and his girlfriend, Kam Yi-man, 22, were hurled through the windscreen. The accident blocked traffic on Clearwater Bay Road for more than three hours. The couple were on their way to Chow's home in Sai Kung when the crash occurred just before 7am. The Honda Civic went out of control in the Sai Kung-bound lane of Clearwater Bay Road near the junction of Ka Shue Road. Senior Inspector Law Hee-how, of the Kowloon West traffic unit, said: 'The crash barrier acted as a springboard for the car. 'The vehicle shot like a cannon ball about two metres into the air and flew a distance of about five metres before hitting a lamppost. 'Then it made a 90-degree turn after hitting the lamppost and flew across two lanes and plunged into the central divider. The car landed on its side.' A taxi then crashed into the wreckage. The driver, 58, escaped with minor injuries. Mr Law said it appeared the two victims did not have their seat belts fastened. 'We suspect the car was travelling well over the legal speed limit of 70km/h at the time of the crash,' he said. Traffic in the area was disrupted for several hours as government chemists and police examined the scene. All Sai Kung-bound motorists were diverted to Tseung Kwan O. The car wreck was towed to a government vehicle plant in Ho Man Tin for examination.