Study On Residents’ Travel Rules And Rail Transit Network Planning And Design Of Big Cities In Eastern China

Along with the continuous development of China’s urbanization level(the number of residents and the size of cities increased significantly),the comprehensive strength of the city has continued to grow,and the basic public service facilities have been further improved,forming a spatial functional area of eastern big cities.It profoundly affects the displacement of residents’ travel activities and the scientific design of rail transit network planning,which faces many problems and challenges need to think at the same time.How to grasp the characteristics more accurately in order to maintain the pertinence and goal-directed action in the process of transportation planning or urban master planning? Moreover,the construction and creation of a rail transit system with distinct functions,clear systems,backbone-led,and efficient collaboration in big cities becomes a necessary choice for public transportation networks and is in line with the national strategy of giving priority to the development of public transportation in urban areas.The author fully understands and summarizes the current research status at home and abroad,and clarifies the areas that can be improved and optimized.From this,the key technology route of the research,and the idea of guiding this subject are established,next the purpose and significance of the urban transportation planning and management are pointed out.Furthermore,on the basis of ensuring the output accuracy of the results,the calculation load should be reduced as much as possible,the efficiency be improved and the resources be saved,which can effectively assist and support the travelers’ decision making behavior,active intervention measures incentives,government construction investment judgments,and rail transit complex network changes and growth.From the perspective of adaptive theory and practice,this thesis focuses on the modeling of residents’ travel rules and rail transit network planning and design methods in the eastern big cities(Nanjing,Suzhou,Jining).More specifically,the main and in-depth research work of this thesis includes the following four aspects:(1)Multi-mode travel behavior modeling of metropolitan residents considering spatiotemporal attributesIn order to reveal the urban transportation mode structure and residents’ travel behavior rules from the micro or individual level,and to better understand its importance to the traffic system management and planning,based on these panel type data obtained from the travel survey,a set of dummy variables are adopted as the basis for modeling input in this section.The formulas/expressions of a general mixed logit model should be optimized and improved(considering multiple observations for each person)to refine the new parameter estimation output program,obtaining the convergent regression results.It takes Nanjing as an example to clarify the interaction mechanism/logical explanations of sociodemographic characteristics,trip purposes,and spatio-temporal attributes variables in affecting the travel mode choice behavior,in addition,the capture of the utility function of each mode and the analysis of factors’ significance tests have confirmed the specific advantages of rail transit itself,especially it meets the needs of different classes,urban itineraries,and increased travel time.Then the policy suggestions and enlightenments related to multi-dimensional governance to alleviate the conflicts of traffic supply and demand,integrative development of land use,and travelers’ accessibility/fairness improvement,as well as certain follow-up plans and the exploration of rail transit planning are expounded and discussed.(2)Demonstration of metropolitan rail transit network planning based on the multicriteria decision supportFacing fast-developing cities,the evaluation and selection/determination of transportation engineering projects is one of the important planning activities among different agencies and departments,which will continue to enhance the regional competitiveness and increase economic and social benefits.On account of the preparation and arrangement of rail transit planning performance measurement,this section explores the application of a multicriteria matter element decision support mathematical model and a three-stage program processing framework to investigate the potential of Suzhou rail transit network planning alternatives.Compared with traditional analysis tools and decision making methods,the constructed model incorporates a wider range of benefit clusters and cost clusters,and and adopts a combination weighting method to quantify the contradictions of subfactors and ameliorate the result deviation caused by a single approach.Besides,comprehensively through the cross-comparison of acquired correlation degree values,validity/feasibility test with classical methods,and the independent cluster sensitivity analysis,some possible changes in this mathematical model are excavated and discussed,proving the stability of its final results output.On the whole,this decision support demonstration system is flexible,comprehensive,reasonable and reliable.And the rigorous calculation steps described reduce the chances of irrational decisions and risks,which can show huge and considerable inherent advantages in helping planning and decision makers perform specific field tasks.(3)Optimization of metropolitan rail transit network design under the dynamic α-OWAD operatorEspecially for the scenes that are also distinguished from the existing literature relies too much on the partial static weighting framework,to overcome its shortcomings under the modern complex background,this section uses the integrated design of an α-OWAD(ordered weighted averaging distance)operator to update and rewrite the traditional TOPSIS(technique for order preference by similarity to an ideal solution)method,adding a gain function expression f to enhance the modeling effect when dealing with actual and practical problems.After characterizing the key index system of Jining rail transit network/multi-party expectation coordination,this improved TOPSIS methodology is employed to carry out empirical analysis or a case study,and to explore its application effectiveness and decision support process.Through the continuous calculation of value intervals of this variable α,different conservative or radical decision making areas are displayed,which are used to test the pros and cons of various planning network designs,and to measure the preference characteristics of decision making actors,etc.Finally,the calculated project priority ranking with dynamic sensitive process analysis can be utilized by the stakeholders of urban planning management.This established verification procedure is scientific,effective,and has strong applicability.In the meantime,as a new idea of urban rail transit network design optimization research,it is worth strengthening study,or it can be promoted and transplanted to similar engineering fields.(4)Research on rail transit network planning given the integration of actual topology and transfer structure informationThis section is an organic supplement generally to the results of the aforementioned partial static or fixed network research.It is well integrated into the line growth and complex system perspective,and the current status of the Nanjing metro network facilities is mathematically abstracted into the physical network of the station and the station transfer network considering residents’ travel convenience(adjacent matrices).After investigating and understanding the content of these commonly used feature statistics of the topology,starting with the concept of network system vulnerability or robustness,the possibility of multiple external interference or emergencies has been measured and assessed,and the following three node attack strategies are set up in this work,namely sequential deliberate attacks,multiple random attacks,and adjacent stations iterative attacks.Given this,the dynamic response effects of parameter network global efficiency/information transmission efficiency are simulated and tested respectively.Additionally,according to the comparison of its changing trends and the decline rate of a certain node,the key elements that influence the internal connectivity of the network are discovered and marked clearly.It is further extended to the line growth scenario analysis,these research conclusions gotten are helpful to support the planning and construction of the rail transit network and the refined management,and to ensure the network operation service level,distinguishing it from the traditional public transit network planning and design methods.Overall,based on the actual situation of rapid urban development at present,the research results of this thesis can promote the verification of residents’ travel spatio-temporal attributes and integrated demonstration and analysis of the rail transit network design,and enrich the content/documentation of case application and practice.In view of this,the evolution and development process of metropolitan transportation modes will be improved,and its modeling method can gradually realize the combination of dynamic and static,which meets the reality to a greater extent and provides important data support and theoretical reference value for strengthening the performance of the urban rail transit network.