2 sentences

1. 过马路时要走人行横道。

   guò mǎ​lù shí yào zǒu rén​xíng​héng​dào.

   Use the crosswalk when crossing the street.

   Source: Dong Chinese Dictionary

2. 行人通过马路要走人行横道。

   xíng​rén tōng​guò mǎ​lù yào zǒu rén​xíng​héng​dào.

   Pedestrians should use crosswalks when crossing the road.

   Source: Dong Chinese Dictionary