PSI - Issue 44

E. Renzi et al. / Procedia Structural Integrity 44 (2023) 355–362 E. Renzi et al./ Structural Integrity Procedia 00 (2022) 000 – 000

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6. Hazard Identification 7. Safety Risk Assessment and mitigation 8. Human and Organizational factors

Safety Risk Management

Just Safety Culture

9. Just Safety Culture

10. Safety Performance Monitoring and Measurement 11. Change Management 12. Continuous Improvement

Safety Assurance

13. Training and education 14. Safety Communication 15. Interface management 16. Compliance monitoring

Safety Promotion

Interface management and Compliance monitoring

Even if the proposed SMS guidelines could be progressively improved and refined, a first but very important result has been reached: through the application of a system of integrated procedures, the road infrastructure managers can perform a complete and optimized management of the infrastructures (also for what concerns both the maintenance and the safety of the road traffic), thus allowing an integrated surveillance on the safety performance of the national road network (using homogeneous criteria for all the tracts managed by different managers). Because of the need to be adjustable (based on the dimensions of the different managers) and to be sufficiently flexible (to consider more domains and/or aspects), the proposed integrated SMS (which represents the “horizontal rule”) should be as independent as possible from the considered “vertical domains” (and so from the relative “vertical rules”). The link between a traditional AMS and the proposed integrated SMS, must be necessarily based on the sharing not only of data but also of information and results of all the analysis related to all the main assets, aimed at improving actions and decision-making processes. Some of the main features considered in the proposed SMS framework and to be related with the traditional AMS approach applied by road managers can be summarized as follows: - the inspections conducted on the various elements of the different domains (the SMS needs to optimize their scheduling, record the inspection sheets, etc.); - the initial classifications of the domains and of the domains’ elements in terms of a preliminary rating or condition/index (e.g. for the bridges it is necessary to keep track of the so-called AC); - the operational/structural risk mitigation measures to adopt in the short, medium, and long term as related to the classification or by specific evaluations; - the priority of maintenance interventions and all the activities depending on them, also considering the contractors and their interaction with the operativity of the infrastructure (e.g. the execution of works in tunnels with limitations of lane usage); - the monitoring of transiting loads and structures (e.g. the continuous structural monitoring systems with accelerometers, etc.), which can also trigger some mitigation measures or traffic interruptions; - all the changes that in some manner can affect the safety performance and all the activities necessary for the coordination of the emergencies that do happen. The above illustrated explicative list allows an integrated risk assessment and the evaluation of the impacts of critical events on the network performance and responsiveness, which, thanks the SMS’s framework – based upon different horizontal domains/rules – allows the definition of the network (and its single parts) robustness and resilience. 5. The Network Performance Optimization The outputs of the GMEB and, in general, of all the procedures of the vertical domains processed by the SMS of the road managers, will allow the complete knowledge of the status and of the expected performance of the asset systems (bridges, in particular) that compose the national road and motorway network. On the basis of this overall vision, investment plans, aimed at maintaining and strengthening the resilience of the entire national road network,