The work focuses on the value generation of bridges at a network level, defining a metric built on sustainability indicators. Data analysis shows that Switzerland performs well in infrastructure planning, financing, and delivery. Since 2003, the Federal Roads Office has emphasized sustainability through the NISTRA evaluation method. Currently, infrastructure delivery heavily relies on asset management, with small state-level road authorities handling both tactical and operational management. Tactically, their goal is to meet sustainability policies set at a strategic level, while operationally, they prioritize repair ranking. In turn, prioritizing maintenance results from a decision-making process that combines the condition-state and network-level value of an asset. In the case of bridges, while condition-state assessment can be outsourced to private companies, setting priorities remains the responsibility of bridge managers. To ensure sustainable bridge management, research must focus on these critical aspects to provide bridge authorities with sound rating tools for maintenance prioritization. Bridge value is country-specific and time-variant, influenced by socioeconomic trends and susceptibility to natural hazards: the task is complex. The paper presents a metric to quantify bridge value at a network level through indexes establishing the social, economic, and environmental value of bridges along the primary cantonal road network in Canton Ticino. Additionally, it contributes to a tailored, adaptive, and transparent decision-making framework to increase the reputation of asset management authorities. Finally, the work underscores the importance of tracking the evolution of bridge value to update repair priorities, addressing possible changes in operational and budgetary constraints, and ensuring sustainable infrastructure management.