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Optimizations of network layout and transport service frequencies in view of interests of transit line operators and utilizers

Zhu Xiaojing, Feng Xuesong, Zhang Lukai, Hua Weixin

Archives of Transport

2019

Vol. 50, iss. 2

47--55

Layouts of bus networks in cities are always irrational currently, transport service frequencies also need to be optimized according to the real network layouts, operation conditions and travel experience of passengers, so it is essential to optimize bus transit network layouts and transport service frequencies systematically. Different stakeholders are involved in the optimization of urban bus transit network layouts like the government, operators and passengers, whose interests are always contradictory. In order to optimize transit network layout and service frequencies from the view point of operators and utilizers, this research constructs a multi-objective model and proposes a solution algorithm. The proposed multi-objective model is established from the perspective of operators with the goal of minimizing total operating costs for one day, and from the perspective of the utilizers to minimize the total travel time, respectively. Also with the application of electric bus in cities, buses in this research are electric buses all for green travel. Moreover, a solution algorithm is proposed in this research to solve the proposed multi-objective model with simulated annealing algorithm and genetic algorithm. Simulated annealing algorithm is used as the main framework of the solution algorithm from the perspective of operators to minimize operating costs, while genetic algorithm is used as the subroutine of simulated annealing algorithm to optimize total travel time. Verification of the proposed model and the solution algorithm is based on an intuitive network. The application results of a numerical experiment verified that the proposed optimization model and the solution algorithm are able to optimize the network layout and service frequencies at the same time.

Optymalizacja obsługi pasma zabudowy transportem zbiorowym

Dudek M., Rudnicki A.

Prace Naukowe Politechniki Warszawskiej. Transport

2007

z. 63

51-59

Referat przedstawia modelowe ujęcie funkcjonalności różnych rodzajów środków transportu zbiorowego, obsługujących pasmo zabudowy. Analizowano wpływ długości pasma oraz długości i gęstości podróży. Optymalny wybór środka przewozowego może być dokonany na podstawie kryteriów: rzeczywisty czas podróży, ekwiwalentny czas podróży uwzględniający zróżnicowaną uciążliwość poszczególnych jego składników oraz uogólniony koszt podróży, uwzględniający także koszty inwestycyjne.

The paper presents model approach of different types of public transport modes, which can serve a band structure in urban areas. The short overview of investigated similar problems has been made. The assumptions for operational features of individual modes were given. The following measures of service effectiveness are formulated: real travel time, equivalent travel time with regard to diverse inconveniency of particular components in travel, generalised travel cost including charge of investment expenses. Optima! choice between options: standard or articulated bus using common lanes or dedicated lane, classical tram, fast tram can be decided depends on length of build-up band, length of travel inside it and unit trip generation of urban area. Application of the described models tor the case of the public transport system in the city Wroclaw has been outlined.