highway level crossing signal

例句：

1. 1. The highway level crossingsignal is essential for ensuring safe driving.
   高速公路水平交叉信号对于确保安全驾驶至关重要。
2. 2. Thetraffic police are responsible for monitoring the highwaylevel crossing signal to prevent accidents.
   交通警察负责监控高速公路水平交叉信号以防止事故。
3. 3. Thedriver should always check the highway level crossingsignal before entering a new intersection.
   驾驶员在进入新的交叉口之前应该总是检查高速公路水平交叉信号。