What must a driver do when international signs differ from US signs?

When driving in a situation where international signs differ from US signs, it is essential for a driver to follow the international signs as long as they are clearly understood. This is because international road signs are designed with universal symbols and meanings that can provide clear guidance to motorists, regardless of their home country.

The rationale behind this practice is rooted in the assumption that many drivers may be unfamiliar with the traffic control devices of the country they are in. Therefore, it is important to recognize and adhere to the rules and instructions communicated by those international signs, especially when they are easily understood. Doing so contributes to road safety and ensures that drivers comply with local traffic laws.

Navigating with signs that are clear and understandable helps prevent confusion, enhances the driver's situational awareness, and supports a smoother driving experience while traveling in foreign territories. It is important to remember that while US signs may be familiar, the priority lies in any signs that are in use in the local area, particularly if they hold authority in that context.