2 sentences

1. 过马路要走斑马线。

   guò mǎ​lù yào zǒu bān​mǎ​xiàn.

   Use the crosswalk when crossing the street.

   Source: Dong Chinese Dictionary

2. 过马路时，行人一定要走斑马线并观察路况。

   guò mǎ​lù shí, xíng​rén yī​dìng yào zǒu bān​mǎ​xiàn bìng guān​chá lù​kuàng.

   When crossing the street, pedestrians must use the crosswalk and pay attention to road conditions.

   Source: Dong Chinese Dictionary