The digital economy is driving government data sharing as a cornerstone of modern governance. Within the transportation sector

the imperative for data interconnection is amplified by the ongoing digitization of highways. The "transportation power" strategy explicitly recognizes data as a critical factor of production

necessitating the dismantling of sectoral silos. Furthermore

a joint notice issued in 2024 by the Ministry of Transport and other departments underscored data sharing as pivotal for implementing highway management innovations

emphasizing the urgency of overcoming cross-sectoral data barriers. In this milieu

addressing the data barrier within Y City's highway department holds significant implications. Primarily

it facilitates "highland linkage" to advance highway digitalization

thereby enhancing traffic governance and the travel experience. Secondarily

it contributes to the body of research on cross-sectoral data governance and enriches the collaborative practices of digital governance. This paper commences by characterizing the data barriers observed in a specific locale

proceeds to analyze their root causes

constructs a multi-layered collaborative resolution mechanism

and delineates the application pathways and outcomes. The objective is to furnish a reference for comparable data barrier challenges.