Quality control management of structural concrete, as well as of concrete road bridges shows a ot of differences within European countries. This article provides not only an overview of the state of the art, but presents also a holistic approach for the performance evaluation of structural concrete. To standardize the methodof quality controls in Europe and consequently the decision making of maintenance measures, the purpose ofthe project COST Action TU1406 was the development of a guideline for the establishment of quality controlplans for roadway bridges. It deals with the survey of the relevant performance indicators for the conditionassessment of road bridges. To identify data concerning performance indicators, the member countries of theCOST Action were asked to extract all information from documents already used by operators, as well as fromresearch documents. The procedure for the collection and documentation of the data and their evaluation isdiscussed in detail. A major part of the process deals with the homogenization and categorization of the resultsfrom the survey, in order to subsequently identify performance indicators and to reduce them to the relevantterms. Furthermore, on the basis of the reduced performance indicators, an evaluation system was developed forthe assessment of the condition of road bridges. In order to be able to assess the current state of structures and toestimate the necessary investment costs for its preservation, the grades of the individual performance indicatorsare used to calculate the overall grades for the so-called key performance indicators. These contents represent a basis and an important step for the further work stages for the development of a standardized guideline for the establishment of quality control plans for roadway bridges in Europe.