Benin
total: 578 km
narrow gauge: 578 km 1.000-m gauge (2008)
Bolivia
total: 3,504 km
narrow gauge: 3,504 km 1.000-m gauge (2008)
Bosnia and Herzegovina
total: 1,000 km
standard gauge: 1,000 km 1.435-m gauge (590 km electrified) (2008)
Botswana
total: 888 km
narrow gauge: 888 km 1.067-m gauge (2008)
Brazil
total: 28,857 km
broad gauge: 5,709 km 1.600-m gauge (459 km electrified)
standard gauge: 194 km 1.440-m gauge
narrow gauge: 22,954 km 1.000-m gauge (2008)
Bulgaria
total: 4,294 km
standard gauge: 4,049 km 1.435-m gauge (2,880 km electrified)
narrow gauge: 245 km 0.760-m gauge (2008)
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
(2008)
Burma
total: 3,955 km
narrow gauge: 3,955 km 1.000-m gauge (2008)
Cambodia
total: 602 km
narrow gauge: 602 km 1.000-m gauge (2008)
Cameroon
total: 987 km
narrow gauge: 987 km 1.000-m gauge (2008)