Aug 15, 2015 Raiway lines in North Eastern Region North Eastern States have an average railway network density of 10.1 km/1000 sq. Km against a national average of 20 km/1000 sq. km. railway network density. So far 12 new line works have been taken up in North Eastern Region having a total length of 1248 km at a total cost of Rs. 38,416 crore.