Get latest articles and stories on India at LatestLY. Every year, during foggy weather in the winter months, a large number of trains are affected, especially in the northern parts of the country. To ensure smooth rail operations, Indian Railways have provisioned 19,742 Fog Pass Devices during the foggy weather. India News | Railways Provision 19,742 Fog Pass Devices to Ensure Smooth Rail Operations During Foggy Weather.