OS-Permit is an online system that allows users to apply for and obtain operation permits for vehicles subject to travel restrictions, in accordance with the relevant provisions of the Road Act and the Road Traffic Act, anytime and anywhere via the internet. Enforcement against restricted vehicles is carried out pursuant to Article 77(1) of the Road Act and Article 79 of its Enforcement Decree, with the aim of preserving road structures and preventing risks associated with vehicle operation by regulating trucks, construction machinery, and other vehicles that exceed prescribed standards.