Density Wave, Energy Consumption Of Traffic Flow & Field Measure Of Reverse Flow On Main Road

Following Chinese urbanization, the modern transportation networkgradually established, each interurban transportation industry is active, howeverthe road construction often lagged behind the rhythm of economic boom and theautomobile industry development step, the contradiction between them is evenmore prominent. Frequently accident and traffic jam become more and moreserious, the economic loss and the energy consumption from which congestionbrings has gradually aroused society's attention. It is necessary to establishproper traffic model using traffic science, which can be applied to actualtransportation question and resolve it. In the paper, the following researches ondensity wave, the energy consumption & the actual application of fluidmechanics model to traffic jam are conducted, specifically as follows:(1)Two kinds of "Multiple Look-ahead" car-following models proposed byWilson et al. were studied with perturbation theory. In unstable conditionthe non-linear characteristic of density wave are investigated, at the sametime the modify KdV equation is derived also, which describes the timeevolution of density wave. In phase diagram the theoretical analysis was coincident with the simulation value.(2) The above two kinds of models still appeared the collision phenomenon as special sensitivity value small. To remove this drawback, a new "Multiple Look-ahead" model considering multiple velocity difference ahead is proposed, where multiple speed difference have different weight. The stable criterion is derived by applying linear stability analysis, and results indicate the model has extremely well stability.(3) In stable condition, the additional energy consumption formula of the whole car flow is derived by the kinetic energy theorem. Systemically, the additional energy consumption in several car-following models is analyzed, and the results have proved theoretically, the more stable traffic flow is, the low energy consumption of traffic is.(4) The method to investigate the average energy consumption of each vehicle in congestion is firstly proposed. On the basis of the detailed analysis about the average energy consumption in several typical car-following models, it is noticed that the profile of average energy consumption curves are loops, and the asymmetry shape indicated that the consumption of energy entering congestion is more than that leaving congestion.(5) In real traffic, the congestion caused by reverse flow on main-road is studied. LWR model is applied to the intersection in front of Guangxi University guard during the green light period. The simulation results reflect the real traffic jamming at intersection, which is coincident with field measure, and analysis of impact of the revere flow on main-road is conducted.Finally, the outlook of future researches is concluded.