Assessment Method for County-level Guidance Information Importance Based on Subjective and Objective Empowerment-TOPSIS Approach
In county-level administrative regions of China,the hierarchical principle of signage guidance based solely on administrative rank sometimes fails to objectively reflect the transportation needs.To optimize the strategy for setting signage guidance in county-level administrative regions,and enhance the road network functionality,this study proposed the assessment method for guidance information importance based on subjective and objective empowerment-TOPSIS approach.First,tailored to the characteristics of county-level administrative regions in China,the evaluation system covering 11 indicators(i.e.,population,area,economy,number of tourist attractions,road network size,etc.)was constructed.Second,the subjective guidance information importance was statistically analyzed by using the Likert scale method to obtain the subjective importance scores.Third,the principal component analysis was employed to objectively weight the indicators based on their internal characteristics.The principal components,which achieved the cumulative explained variance of 85%,were weighted according to the corresponding eigenvalues to obtain objective importance scores.Subsequently,the TOPSIS approach was used to comprehensively evaluate the subjective and objective scores,obtaining the relative closeness degree of each sample with both subjective and objective criteria.Finally,based on the relative closeness degrees of county-level administrative regions compared with corresponding z-scores within the province,the list of highly important county-level administrative regions was generated,serving as the basis for decision-making in signage guidance selection.Taking two expressway interchanges for examples,based on the assessment result with subjective and objective empowerment-TOPSIS approach,the signage guidance information selection schemes were proposed corresponding to the transformation nodes of county-level administrative regions.The rationale of proposed assessment method was verified through the field surveys.The result indicates that the proposed method optimizes the setting strategy for signage guidance information,which can provide the reference for signage layout information selection.
intelligent transportguidance information importanceprincipal component analysisTOPSISsignage
NETL
NSTL
万方数据
