What do two broken white lines along the centre of the road signify?

Two broken white lines along the centre of the road signify an alert to continuous lines ahead. This means that drivers should be attentive as they approach an area where they may no longer be permitted to overtake or change lanes freely. The presence of broken lines indicates that overtaking is generally allowed, but the broken lines serve as a warning to upcoming continuous lines, which usually mark a zone where overtaking is not allowed for safety reasons.

Consequently, the other options do not accurately describe what two broken white lines represent. For instance, while the end of a zone for overtaking might be indicated by continuous lines, it is not applicable in this context where the focus is on the transition signaled by broken lines. Likewise, a safe stopping zone or indication of a speed limit are unrelated concepts not tied to the marking of broken white lines.