Tesla’s Full Self-Driving (Supervised) system is continuing to gain traction internationally, with South Korea’s expressway authority offering glowing feedback after a full day of real-world testing on public roads.
According to a report published by the Korea Expressway Corporation — a government-affiliated agency that oversees South Korea’s national expressway network — on Naver Cafe, FSD version 14 underwent an extensive autonomous driving evaluation on December 15, 2025, from 10 a.m. to 6 p.m. (via Teslarati). The test included four occupants inside the vehicle, among them the head of the corporation’s mobility department. It evaluated all four FSD driving profiles, ranging from the ultra-cautious “Sloth” mode to the recently reintroduced, more assertive “Mad Max” setting.
The test route spanned a mix of highways and urban environments, including major expressways like Gyeongbu, Cheonan, and Cheonan–Nonsan, as well as dense city areas such as Dongtan New Town, Sejong Special City, and Daejeon Metropolitan City. This broad scope allowed evaluators to observe how FSD handled everything from high-speed lane changes to complex urban traffic scenarios.
On highways, the expressway authority described FSD’s performance as “excellent,” citing smooth maneuvers, confident decision-making, and stable autonomous operation. Testers did note occasional issues, including violations of local bus-only lanes and speed limit rules, as well as instances where FSD appeared to follow traffic flow rather than strictly adhering to posted regulations. However, these were framed as software-level issues that could be addressed through future updates.
In city driving, the feedback was arguably even stronger. Evaluators said FSD already exceeded the capabilities of an average human driver in most scenarios, with the primary exceptions being unprotected left turns and work zone intersections — two areas that remain challenging for many autonomous systems globally.
It’s worth noting that FSD availability in South Korea remains limited. Currently, the software is only offered on U.S.-imported vehicles, effectively excluding the Model 3 or Model Y, which make up the majority of Teslas on Korean roads. Despite that constraint, local owners collectively logged over 1 million kilometers (621,000 miles) using FSD in just one month after launch.
FSD (Supervised) first went live in South Korea in late November, and the system has already earned praise from lawmakers, including National Assembly member Lee So-young, who recently used it to navigate Seoul. Tesla also expanded FSD access to the Cybertruck in the country just weeks ago, underscoring the rapid pace of its rollout.
While Full Self-Driving remains a supervised system, feedback like this from a national expressway authority adds to a growing body of real-world validation — and suggests the software is maturing quickly outside of Tesla’s home markets.
