Research on Model Development for Freeway Safety Facilities

Abstract EN

To make freeway safety facilities function well, field survey is carried out to evaluate themaintenance quality of freeway safety facilities.

In traditional models, the same weight values areassigned to the safety facilities while evaluating without considering the functional differences ofdifferent facilities.

The paper develops the maintenance quality evaluation procedure and the modelconsidering the functional differences of freeway safety facilities.

In the evaluation procedure, thesafety facility damage in function is the main index to get the evaluation scores for each kind offacility.

The purpose of the model is to convert the evaluation scores of different safety facilities to anoverall maintenance quality measure, and this result can reveal the overall facility maintenancequality of the freeway segment.

In order to build the model and confirm the calculated weight of eachkind of facility, Multivariable Regression and Optimized Analytic Hierarchy Process were usedseparately.

The model was validated by comparing the proposed model evaluation results and thereorganized survey evaluation results.

The coefficient of correlation (R2 value) is 0.9048, whichshows strong correlation between the subjective evaluation and objective evaluation.