Bosnia and Herzegovina
total: 1,021 km (795 km electrified)
standard gauge: 1,021 km 1.435-m gauge (2002)
Botswana
total: 888 km
narrow gauge: 888 km 1.067-m gauge (2002)
Brazil
total: 31,543 km (1,981 km electrified)
broad gauge: 4,961 km 1.600-m gauge (692 km electrified)
standard gauge: 194 km 1.440-m gauge (630 km electrified)
narrow gauge: 25,992 km 1.000-m gauge (581 km electrified)
dual gauge: 396 km 1.000-m and 1.600-m gauges (three rails) (78 km
electrified) (2002)
British Virgin Islands
0 km
Brunei
total: 13 km (private line)
narrow gauge: 13 km 0.610-m gauge (2001 est.)
Bulgaria
total: 4,294 km
standard gauge: 4,049 km 1.435-m gauge (2,710 km electrified)
narrow gauge: 245 km 0.760-m gauge (2002)
Burkina Faso
total: 622 km
narrow gauge: 622 km 1.000-m gauge
note:: another 660 km of this railway extends into Cote D'Ivoire
(2002)
Burma
total: 3,955 km
narrow gauge: 3,955 km 1.000-m gauge (2002)
Burundi
0 km
Cambodia
total: 602 km
narrow gauge: 602 km 1.000-m gauge (2002)