Abundant observations have shown that road traffic flow contains complex fluctuations. One frequently mentioned question is: Whether traffic flow belongs to 1/f fluctuation and in which time-scale region the 1/f fluctuation appears? The answer of this problem is useful, since it may help to distinguish the implicit short-range/long-range correlation and self-similarity of traffic flow time series. Notice that traffic flow yields different behaviors at different time scale, some previous studies applies Detrended Fluctuation Analysis (DFA) method to filter out the polynomial trends. In this paper, the urban traffic flow data collected from Beijing China and the freeway traffic flow data collected from Washington State, USA are analyzed using Multi-Fractal Detrended Fluctuation Analysis (MF-DFA). The Hurst exponents of these two kinds of traffic flow are larger than that of 1/f noises and smaller than Brownian noises, which indicates the existence of the long-range correlation in urban traffic flow time series. The multi-fractal spectra of these two flows are carefully studied and the differences are highlighted. Results indicate that a multi-fractal description is required for traffic flow, since multi-fractal behaviors are found. This result also partly answers another attractive question: What difference can we observe between freeway and urban transportation network traffic flow?
Traffic Flow Volume Fluctuation Analysis using MF-DFA
Second International Conference on Transportation Engineering ; 2009 ; Southwest Jiaotong University, Chengdu, China
2009-07-29
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Highways and roads , Information technology (IT) , Transportation management , Construction , Freight transportation , China , Traffic flow , Traffic volume , Water transportation , Air transportation , Rail transportation , Traffic analysis , Optimization , Public transportation , Traffic management
Traffic Flow Volume Fluctuation Analysis using MF-DFA
British Library Conference Proceedings | 2009
|Fluctuation in Expressway Traffic Flow
British Library Conference Proceedings | 2005
|Fluctuation and Seasonality of Hourly Traffic and Accuracy of Design Hourly Volume Estimates
Online Contents | 2008
|Fluctuation and Seasonality of Hourly Traffic and Accuracy of Design Hourly Volume Estimates
Transportation Research Record | 2008
|