01099185

Component

This paper examined the traffic time series data measured by flow and density. Traffic volumes and occupancies were collected from a loop detector station on a four-lane highway at an interval of 30 seconds. Two analysis time periods were selected: non-peak hour period 12am to 4am, and peak-hour period 4am to 8am. The traffic data were subsequently aggregated to different time scales; 1-min and 2-min for further analysis. The nonlinear dynamics of traffic time series data among each lane were investigated by using phase space reconstruction and Liapunov exponent methods. The results have shown that during the non-peak hours, traffic behaved stochastic on all lanes at all three time intervals; 30-sec, 1-min and 2-min. However, for the peak-hour period, there is some discrepancy on flow and density results among different time intervals. The statistical analysis on 30-sec interval suggested traffic chaotic behaviors occurring on all four lanes except for being stochastic on lane 4 (next to exits) which was evident by flow time series analysis. For 1-min and 2-min intervals, traffic has exhibited some chaos on four lanes from both flow and density results.

01084478

08-1058

English

24p

2008

Transportation Research Board 87th Annual Meeting

DVD

Figures (19) ; References; Tables (3)

Four lane highways; Loop detectors; Peak hour traffic; Traffic data; Traffic flow; Travel behavior; Travel patterns; Travel surveys; Types of roads by number of lanes

Chaos

Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning

Transportation Research Board Annual Meeting 2008 Paper #08-1058

TRIS, TRB

Jan 29 2008 3:24PM