Abstract
To study the law of traffic wave transmission in highway interchange, this study analysed the traffic characteristics of the interchange section, developed an improved speed-density model of highway interchange based on 5PL logistic model by modifying the turning density and the mixing rate coefficient. The correction coefficients Δ1, Δ2 related to the traffic of the ramp were introduced and quantified by the nonlinear fitting and multivariate linear regression analysis of the simulation data under different traffic volumes combinations. The actual operation data of the interchange section was collected on site, and the difference between the calculated value and the actual value of the model was compared to verify the correctness and versatility of the model.
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