Abstract
The horizontal curve is a very common linear in the road design. On the other hand, the horizontal curve in the approach bridge may affect the traffic flow in many ways. The north approach span of Nanjing Yangtze River Bridge is herein taken as an example. With the help of the traffic speed data ,traffic density data and traffic volume data from the traffic survey and analysis, the features of traffic flow,which change with the morning peak appearing, have been found by modeling. Finally, the paper gives several ways to optimize the traffic management and control, improve transport and security.
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