And Hammam narrated from Abu Huraira, may Allah be pleased with him, and he narrated from the Prophet, peace and blessings be upon him, that:
Removing something harmful from the road is also a charity.

Narrated Usama bin Zaid: Once the Prophet stood at the top of one of the castles (or higher buildings) of Medina and said, "Do you see what I see? No doubt I am seeing the spots of afflictions amongst your houses as numerous as the spots where raindrops fall (during a heavy rain). (See Hadith No. 102)