4 ms·

California is one. https://www.pressdemocrat.com/article/news/what-does-when-children-are-present-mean-on-speed-limit-signs/ https://www.pressdemocrat.com/arti

• russdill 5y ago
  I live near a road that is divided and normally a 50, unless children are present. It'd be nice if they had flashing lights.