@atlas.istructures: Ever wondered how engineers keep the air inside road tunnels safe to breathe? 🚇🌬️ Engineers use tunnel ventilation systems to push fresh air into the tunnel through lower ventilation points while extracting polluted air, smoke, and vehicle emissions through exhaust systems at higher levels. This continuous airflow helps control heat, remove harmful gases, and improve visibility—especially during heavy traffic or emergencies. 🏗️🌬️ Engineering isn’t just about building the tunnel… it’s also about keeping people safe inside it. #CivilEngineering #TunnelEngineering #RoadConstruction #Engineering #Construction