Which statements about a school variable-speed sign are correct under the national rules? Select all that apply.
An illuminated active sign sets an enforceable limit✓الإجابة الصحيحة
Every school location is always limited to 30 km/h
The ordinary posted limit applies when the variable sign is off✓الإجابة الصحيحة
The displayed variable limit is advisory only
Every rural school variable sign must show 60 km/h
الشرح
An active school variable-speed sign sets an enforceable limit, while the ordinary posted limit resumes when that variable sign is off. Assuming every school location is always 30 km/h fails because the displayed variable value and its active state matter.