Bus Rapid Transit Planning And Route Optimization Based On The Heuristic Method

The rapid increase in my country’s urban population,urban area,and urban economy has prompted a large number of new transportation needs.Through the analysis of the current public transportation situation in my country,the necessity and rationality of the research direction of the rapid transit network planning has been demonstrated.Comparing the experience and shortcomings of the research status of BRT network at home and abroad,an innovative method is proposed.Theoretical research on BRT planning,research on the principles of BRT line network layout,the characteristics of layout modes and the feasibility of the three line layout forms;comparative analysis of the advantages and disadvantages of BRT trunk lines,branch lines and connection lines;Explain the rigid conditions and traffic conditions of the BRT lanes;classify BRT stations according to different standards,analyze the advantages and disadvantages and practicality of each type;make assumptions and explanations on the service scope of the bus stations based on TransCAD,Discuss the construction of the TransCAD-based bus line and station database and the shortest path solution method,paving the way for the theory of subsequent chapters.Establish a BRT network planning model,and establish a single-objective mathematical programming model with the largest BRT service OD volume with the constraints of road conditions,BRT station distance constraints,capital investment constraints,two-way traffic constraints,and non-linear coefficient constraints.A multi-objective mathematical programming model with optimal benefit function and no transfer coefficient close to the expected value.According to the idea of heuristic algorithm and with the help of TransCAD’s powerful traffic planning and traffic prediction functions,the BRT network is constructed,and all models that meet the constraints are The objective function of the plan is analyzed,evaluated,and a suitable plan is selected.Bus passenger flow forecasting takes Lanzhou as an example.It conducts detailed traffic survey data on household characteristics,personal characteristics,and travel characteristics in the main urban area of Lanzhou;adopts the most practically applied "four-stage method" to construct a traffic model and improve it.It consists of three parts: modeling ideas,basic data construction,and macro-transport model construction.Among them,TransCAD’s powerful public transportation prediction and evaluation function and GIS map data processing function are used to summarize and analyze the travel demand,travel characteristics,and public transportation network distribution in Lanzhou.For the preliminary screening of roads with strong BRT planning and practicality.Through detailed and reliable case analysis,a BRT network planning plan suitable for the Chengguan District of Lanzhou is finally given.The model method in this paper has the characteristics of strong operability and high engineering practical value.It can provide public transportation planning and optimization for the Lanzhou urban transportation department.The plan has become a good remedy for the prevention of congestion in Lanzhou,and it is also the significance of the model method of this paper.