The Traffic Characteristics Of Multichannel-Merge-One Road With Cellular Automaton Model

Traffic as the city's circulatory system,it shoulders the City Mission of the smooth conduct of organs of metabolism.However,traffic congestion has become a disturbing problem for the urban development,Confluence of multiple sections,as the typical traffic bottlenecks,which very easily leads to urban road networks of "duomiluo" and deadlocks.Multichannel convergence analysis of traffic flow characteristics as the primary work easing congestion,it is particularly important.Based on the investigation of city road traffic flow data of Chongqing city section of the confluence of multiple,analyze driver behavior characteristics of the traffic flow characteristics based on the specific contents are as follows:First of all,multichannel-merge-one road has buffer lane,which is direct type or parallel type.Analyzing multichannel-merge-one road traffic flow parameters' variation characteristics,traffic volume,speed,density(because density is difficult to measure,so space headway is used instead)and building their relationship model.Focus on the lane-changing behavior,there are crowding lane-changing and terminal lane-changing in multichannel-merge-one road,which are forced overtaking.The change characteristic parameters of measured data analysis,get the traffic volume and change the probability model,compared the different speed change lane multiple combined sections of driving behavior characteristics and multiple confluence section of the traffic flow characteristics of the causes are found out.Second,based on driver behavior,optimize the speed effects model,free change lane model and forced change lane model.Driver character parameters and described driving lane of choice probabilities are introduced,building the traffic flow model which based on CA model of multi-channel confluence of urban road.At last,Numerical simulation is implemented by a JAVA programming,simulation results compares with experimental data and the classic Confluence model simulation results.Proves model of driving behavior more realistic.Simulation get traffic flow parameters of direct multichannel-merge-one road and parallel multichannel-merge-one road,Simulation results agree with the analysis.Confirmed direct shift lanes will increase traffic congestion.When the parallel speed change lane is longer,and more disadvantageous to vehicular traffic.When the parallel speed change lane is shorter,multi-channel Confluence area surroundings is better.Direct speed change lane alsocauses mainline and ramp capacity to reduce,Parallel speed lanep-changing is less impact on the mainline and ramps.