Wildlife crossing infrastructure:

The fact that wildlife-vehicle collisions have doubled in the past fifteen years has concentrated transportation agencies’ attention on engineering solutions that prevent wildlife-vehicle collisions on the continent’s roadways. At the same time, roads have been acknowledged as a major obstacle to landscape connectivity and ecological vitality—a matter of growing concern as climate change, in the form of rising temperatures and hydrological shifts, portends increasing wildlife migrations. In this context, the continents’ road systems pose a significant threat to the long-term health and viability of North American wildlife populations.

Source: http://www.arc-competition.com/