Every year, when winter brings in thick fog, it causes a lot of trouble for trains, especially in the northern parts of India. The Fog Pass Devices are like a superhero tool for trains, helping them navigate through foggy weather without major disruptions. Think of Fog Pass Devices as a GPS guide for train drivers during fog. These devices give real-time info about important stuff like signals, crossings, and speed limits. The screen shows upcoming landmarks, and there s a voice guide too, making it easier for train drivers to make the right decisions.