Abstract:

This article probes into the effects of service attribute variation on mode choice transfer and the criticalstate giving rise to mode choice transfer.Through putting forward the concept of critical expectant utility,usingmulti- attribute decision- marking theory,introducing the gradient theory into scalar field and combining the spatialanalytical geometry method,the computational formulas for solving the critical values are derived on the basis of theProbit model.Then,the dependency of the critical balance upon each attribute parameter is described.Finally,according to the computed critical properties,the transfer of public transportation mode (by bus or by car) is ana-lyzed by taking a simple commuting line as the example,with several strategies and two evaluating indicators beingproposed and compared.This research has certain referential value on the formulation and adjustment of transportpolicy.

Key words: transport policy, mode choice, utility function, critical property