Avadh Assam Express
The 15909 / 15910 Avadh Assam Express is an Express train belonging to Indian Railways – Northeast Frontier Railway zone that runs between Dibrugarh, Assam and Lalgarh Junction, Rajasthan in India. At present it currently holds the record for being the longest daily running train in India covering 3116 km in almost 65 hours 50 mins (~3 days). Since this train has such a lengthy route, it is often delayed. It operates as train number 05909/15609/15909/from Dibrugarh to Lalgarh Junction and as train number 05910/15610/15910 in the reverse direction, serving the nine states of Assam, Nagaland, West Bengal , Bihar, Uttar Pradesh, Delhi, Haryana, Punjab and Rajasthan. A metre-gauge train from Lucknow to Guwahati Awadh Tirhoot Mail used to run until gauge conversion took place and the BG Avadh Assam Express was started in late 1980s. Agra Fort to Guwahati Vaishali MG Express (via Silliguri), Kathgodam to Tinsukia MG Express and Lucknow–Guwahati MG Express were long-distance trains on MG in Lucknow. Coaches. The 05909/05910 Avadh Assam Express presently has 1 First AC Cum 2 Tier, 1 AC 2 Tier, 3 AC 3 Tier, 11 Sleeper Class, 3 General Unreserved & 2 EOG (Generator cum Luggage Van) coaches . In addition, it carries a pantry car & up to 1 High Capacity Parcel Vans. As is customary with most train services in India, Coach Composition may be amended at the discretion of Indian Railways depending on demand. COACH COMPOSITION - Service. The 05909 Avadh Assam Express covers the distance of 3118 kilometres in almost 68 hours  & in 68 hours as 05910 Avadh Assam Express . As the average speed of the train is below , as per Indian Railways rules, its fare does not include a superfast surcharge. Routeing. The 05909/05910/15609/15610/15909/15910 Avadh Assam Express runs from ASSAM NAGALAND WEST BENGAL BIHAR UTTAR PRADESH  DELHI HARYANA PUNJAB RAJASTHAN Direction reversal. It reverses direction of travel once at; Traction. Due to partial electrification of the route, a total of 3 locomotives are assigned to this train. A Siliguri based WDP 4 / WDP 4B / WDP 4D locomotive hauls the train from Dibrugarh up to Guwahati Railway station (GHY) handing over to a Ghaziabad based WAP 7 locomotive which hauls the train up to Bathinda Junction following which a Bhagat Ki Kothi based WDP 4 / WDP 4B / WDP 4D locomotive powers the train for the remainder of its journey until Lalgarh Junction. Incidents. The infamous Gaisal train  disaster occurred between Avadh Assam Express and Brahmaputra Mail at Gaisal railway station near Kishanganj railway station.