Brunei:
total: 13 km (private line)
narrow gauge: 13 km 0.610-m gauge
Bulgaria:
total: 4,294 km
standard gauge: 4,049 km 1.435-m gauge (2,710 km electrified; 917 km double track)
narrow gauge: 245 km 0.760-m gauge (1998)
Burkina Faso:
total: 622 km (517 km from Ouagadougou to the Cote
d'Ivoire border and 105 km from Ouagadougou to Kaya)
narrow gauge: 622 km 1.000-m gauge (1995 est.)
Burma: total: 3,991 km
narrow gauge: 3,991 km 1.000-m gauge
Burundi:
0 km