A Multi-modal Stochastic User Equilibrium Considering Sharing Vehicles

The era of sharing economy is coming.It affects all walks of life,including our daily life.Sharing vehicles such as sharing-car and sharing-bike,acts as a pioneer in the field of sharing economy’s era,which changes people’s concept of trip.Sharing vehicles based on mobilephones apps makes people life more convenient and lead people to establish a new concept of lifestyle.The lifestyle makes energy conservation and pollution emissions reduction comes true.Besides,it’s also a kind of lifestyle going green and low carbon credit.This paper does a research on a multi-modal traffic assignment model problem incorporating the transfer between sharing vehicles(car sharing and bike sharing)and other travel modes.The main contents can be summarized as follows:(1)Previous studies of traffic network model,multi-modal traffic assignment and emerging sharing vehicles,including car sharing and bike-sharing are summarized in this paper.The target and significance of this paper are proposed on the basis of the review.Few researches are about the transfer from sharing vehicles to other modes.(2)The travel characteristics of six different traffic models,including car,car-sharing,bicycle,bike sharing,metro and bus are analyzed.And the possible combined transfer travel between the six traffic models and the characteristics of the combined travel are described.characteristics of sharing vehicles,such as few constraints and low cost,allow people to transfer at any station.(3)Constructing multi-modal stochastic traffic assignment modal considering sharing vehicles and relevant solving algorithm.A traffic network model considering car sharing and bike-sharing is constructed based on the theory of super-network.According to the characteristics of different travel modes and the definition of generalized link cost,the link cost function of six travel modes and fictitious links are proposed.Once constructed,the multimodal transfer network considering sharing vehicles can be combined with traffic assignment model.Method of Successive Averages(MSA)algorithm is implemented to solve the model.(4)A numerical example is provided to illustrate the route flows assignment result of the network with sharing vehicles.Compared with the network without sharing vehicles,share ratio of each travel mode has changed which may have effects on environment issues.Besides,the share ratio of each mode will be different when the value of factors,including fuel cost,bikesharing rent and the loss of comfort changes.