Abstract: In one example, we describe a method and system for Tunnel Air Ventilation, which is very practical, economical, and easy to install or implement. The repair and maintenance is safer and less expensive. The overall cost of installation and repair is lower. The system is more stable, and thus, safer for the vehicles and people. It is not damaged by sand, and it does not cause damage to vehicles by sand. So, the risk is minimized. The overall value for the government and society is very high. The efficiency and low down time translates to a cleaner air in the tunnel, which is a major health issue for people, which causes sickness and even death for pollution and toxicity, or by fatal accidents in the tunnel, due to intoxication of the drivers or dizziness. Different variations are also discussed and shown.