Subterranean roads could cut pollution and congestion levels in urban areas

The number of cars on the world’s roads is expected to reach two billion by 2040, significantly increasing pollution and congestion levels in urban areas.
The concept of Deep Roads (Pic: Saffa Riffat)Now researchers at Nottingham University have developed a concept to alleviate environmental and traffic problems associated with the greater use of vehicles, based on a network of subterranean roads.
Unlike tunnels, which can be difficult and expensive to build, particularly over large distan