Bolivia
total: 3,519 km
narrow gauge: 3,519 km 1.000-m gauge (2005)
Bosnia and Herzegovina
total: 608 km (777 km electrified)
standard gauge: 608 km 1.435-m gauge (2005)
Botswana
total: 888 km
narrow gauge: 888 km 1.067-m gauge (2005)
Brazil
total: 29,252 km
broad gauge: 4,877 km 1.600-m gauge (939 km electrified)
standard gauge: 194 km 1.440-m gauge
narrow gauge: 23,785 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) (2005)
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 (2005)
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
(2005)
Burma
total: 3,955 km
narrow gauge: 3,955 km 1.000-m gauge (2005)
Cambodia
total: 602 km
narrow gauge: 602 km 1.000-m gauge (2005)
Cameroon
total: 987 km
narrow gauge: 987 km 1.000-m gauge (2005)
Canada
total: 48,467 km
standard gauge: 48,467 km 1.435-m gauge (2005)