Photo shows the intersection of Lhasa-Gonggar Expressway and Lhasa-Xigaze Expressway. [Photo/Phentok]

In recent years, southwest China's Xizang Autonomous Region has achieved leapfrog development in transportation, and greatly improved the level of transportation infrastructure as well as the road network structure, which has made important contributions to economic development, social progress and improvement of people's livelihood.