BG Express

{{Use dmy dates|date=January 2018}}

{{Use Indian English|date=January 2018}}

{{Infobox rail service

| name = Guwahati–Mariani BG Express

| image =

| image_width =

| caption =

| type = Express

| locale = Assam, Nagaland

| first = {{start date and age|15 August 1998}}

| last =

| operator = Northeast Frontier Railway

| ridership =

| start = {{stnlnk|Guwahati}} (GHY)

| stops = 12

| end = {{stnlnk|Mariani}} (MXN)

| distance = {{convert|404|km|0|abbr=on}}

| journey time = 8h 45m

| frequency = Daily {{efn|Runs seven days in a week for every direction.}}

| class = AC 2 tier, AC 3 tier, Sleeper class, General Unreserved

| seating = No

| sleeping = Yes

| autorack =

| catering = On-board catering
E-catering

| observation = ICF coach

| entertainment = No

| baggage = No

| other facilities= Below the seats

| stock = 2

| gauge = {{track gauge|1676mm|al=on|allk=on}}

| electrification =

| trainnumber = 15665/15666

| speed = {{convert|46|km/h|0|abbr=on}}, including halts

Maximumpermissible speed 110km/hr

| map = File:Nagaland Express (Guwahati - Dimapur) BG Express route map.png

| map_state =

}}

The Guwahati–Mariani BG Express is an Express train belonging to Northeast Frontier Railway zone that runs between {{stnlnk|Guwahati}} and {{stnlnk|Mariani}} in India. It is currently being operated with 15665/15666 train numbers on a daily basis.[http://indianexpress.com/article/india/india-others/train-derails-in-assam-12-passengers-injured/ Train derails in Assam, 50 passengers injured][http://www.thehindu.com/news/national/other-states/train-derails-in-assam/article5917635.ece?homepage=true Train derails in Assam][http://www.easternmirrornagaland.com/new-train-service-introduced-changes-train-terminal/ New train service introduced, changes train terminal] Earlier, the train ran between Guwahati and Dimapur. It was extended to Mariani Junction from 2020.