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China's first road tunnel beneath the Yangtze River will start a three-month trial operation on Sunday in Wuhan , the Xinhua News Agency reported. The 3.6-km, bi-directional four-lane road tunnel would cut travel time to seven minutes from half an hour between the city's major areas -- Wuchang, where government offices and universities are based, and Hankou, the business center. The tunnel will allow 50,000 vehicles to travel at 50 km per hour each day.