Kolkata, Jan 6 (Reporter) Air traffic, train and vehicular services were affected across this metropolitan city and suburban areas following thick foggy condition on Monday morning as visibility came down to below 50 mts, official sources said. The Netaji Subhas Chandra Bose International Airport (Kolkata) sources said besides the arrival and departure of some 30 flights were delayed over two hours, three other flights could not land in the city airport and were diverted elsewhere following a thick blanket of fog enveloped the city between 7 to 9 am, sources added. The unprecedented foggy condition in the city was witnessed for the first time in recent years due to western disturbances, weather office sources said. The train services in Howrah and Sealdah stations were affected as the office and factory workers could not get on time owing to delayed of train timing for poor visibility, which prevented the driver to locate signalling points. Both Eastern Railway and Southeastern Railway's long distance arrival trains could not make on time as traffic was stranded for low visibility, sources added. Down Rajdhani Express, DN Jodhpur Epx, Dn Mumbai Mail via Allahabad, Dn Vibhuti Exp were delayed for nearly four in arrival at Howrah station.The late arrival impacted the departure of the long distance trains from Howrah sources added.The vehicular traffic was similarly affected on the highway in the first hours of the beginning of the week...////...