On April 2, the Sha Daqiao austral Guangzhou (the everybody before building calls its tiger door 2 bridges all the time) formal be open to traffic. From Guangzhou city Ou Dongchong presses down Na Sha since Na Sha big bridge, suitable receive Guangzhou to circle a city the annulus austral the freeway paragraph, at the same time with wide bead north line highway connection, terminus and river of wide deep edge the freeway is conterminous. Na Sha big bridge is full-length 12.89 kilometers, two-way 8 driveway, design driving speed is 100 kilometers horary, can shorten to the distance of Dongguan from Guangzhou south 10 kilometers. Area of Guangdong big bay spans previously lion ocean connects into big talk Guangzhou south and Dongguan and other places have tiger door big bridge only, fastigium driver often is blocked up on the bridge. Catch up with height of holiday wagon flow especially, be being blocked up on tiger door big bridge to celebrate a festival also is not impossible job. Had Na Sha big bridge, also won't be blocked up on the bridge to celebrate a festival again. The be open to traffic of the Sha Daqiao austral nowadays, improved the traffic environment of lion foreign two sides greatly, the Sha Daqiao austral expert analysis can big bridge of billabong tiger door the wagon flow of 30% , big bridge of billabong yellow Bu the wagon flow of 17% .