2 sentences for 天桥 (tiān​qiáo — footbridge)

1. 这两栋大楼通过三层的玻璃天桥相连。

   zhè liǎng dòng dà​lóu tōng​guò sān céng de bō​li tiān​qiáo xiāng​lián.

   The two buildings are connected by a glass skybridge on the third floor.

   Source: Dong Chinese Dictionary

2. 行人应当走天桥过马路，不要横穿马路。

   xíng​rén yīng​dāng zǒu tiān​qiáo guò mǎ​lù, bù yào héng​chuān mǎ​lù.

   Pedestrians should use the footbridge to cross the street instead of jaywalking.

   Source: Dong Chinese Dictionary