2 sentences

1. 道路两旁安装了护栏以确保安全。

   dào​lù liǎng páng ān​zhuāng le hù​lán yǐ què​bǎo ān​quán.

   Guardrails have been installed on both sides of the road to ensure safety.

   Source: Dong Chinese Dictionary

2. 由于车速太快，他躲避不及撞上了护栏。

   yóu​yú chē​sù tài kuài, tā duǒ​bì bù​jí zhuàng​shàng le hù​lán.

   Because he was driving too fast, he couldn't swerve in time and hit the guardrail.

   Source: Dong Chinese Dictionary