speed restriction board

例句：

1. 1.The speed restriction board is a crucial part of the traffic control system.
   速度限制牌是交通控制系统中至关重要的一部分。
2. 2.The driver was fined for exceeding the speed limit on the highway.
   司机因高速公路上超速行驶而被罚款。
3. 3. The speed restriction board is designed to prevent accidents caused by reckless driving.
   速度限制牌旨在防止因鲁莽驾驶导致的事故。