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| Examining the Stationarity and Ergodicity of Traffic Flow on Highway Bridges |
| WANG Qiang1,2, SU Cheng2 |
1. Guangdong Hualu Transport Technology Co., Ltd., Guangzhou Guangdong 510420, China;
2. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou Guangdong 510641, China |
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Abstract According to the information of vehicles collected by weigh-in-motion systems (WIMs) on 28 lanes of 6 highways bridges, stochastic processes of the type of traffic flow on each lane are generated respectively, time means, and time-correlation functions, were calculated accordingly based on stochastic process theory. The stationarity and ergodicity of the composed stochastic processes of the vehicle type of traffic flow were then examined. The statistical characterization of samples collected by WIM systems on actual highways will approach the total value if the samples are sufficiently plenitudinous. Moreover, the statistical characterization of the collected vehicle information will exhibit the characters of the entire specimen. Such results can be used as guides to model random vehicle load further.
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Received: 05 February 2015
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| Fund:Supported by the National Natural Science Foundation of China (No.51078150); the Science and Technology Gallery of Guangdong Province (No.2007B030802002); and the Department of Transportation of Guangdong Province (No.2007-23) |
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2015, Vol. 9 
