3 sentences

1. 这里的交通非常畅通。

   zhè​lǐ de jiāo​tōng fēi​cháng chàng​tōng.

   The traffic here is very smooth.

   Source: Dong Chinese Dictionary

2. 大楼的紧急通道必须时刻保持畅通。

   dà​lóu de jǐn​jí tōng​dào bì​xū shí​kè bǎo​chí chàng​tōng.

   The building's emergency passages must be kept clear at all times.

   Source: Dong Chinese Dictionary

3. 施工队炸掉了阻碍交通的那块巨石，道路恢复了畅通。

   shī​gōng​duì zhà​diào le zǔ'ài jiāo​tōng de nà kuài jù​shí, dào​lù huī​fù le chàng​tōng.

   The construction team blasted the massive rock blocking traffic, and the road was cleared.

   Source: Dong Chinese Dictionary