The sign represents the beginning of the national speed limit, but its simplicity often leads to confusion. In a Reddit thread discussing it, users jokingly guessed meanings such as “national drifting zone” or “go as fast as you want,” poking fun at how often the sign is misinterpreted. Others shared more serious concerns, noting that drivers sometimes treat the sign as a signal to accelerate immediately or overtake without caution. These responses highlighted a clear gap between what drivers learn during formal training and the choices they make on real roads. While humor softened the conversation, the underlying issue was unmistakable: many drivers are unsure how to apply the rule safely.
According to the RAC, the national speed limit sign indicates that previous speed restrictions no longer apply, and drivers must follow the standard limit appropriate for that specific type of road. However, the limit is not the same everywhere. On single carriageways, cars may travel up to 60 mph, while dual carriageways and motorways have a limit of 70 mph. Vehicles such as vans or those towing trailers must follow lower limits, including 50 mph on single carriageways and 60 mph on dual carriageways. Built-up areas with regular street lighting continue to default to 30 mph unless otherwise signed. This variation means drivers must be aware not only of the sign itself but also of the environment they’re entering.
