Sierra Leone
total: 11,300 km
paved: 904 km
unpaved: 10,396 km (2002)
Singapore
total: 3,297 km
paved: 3,297 km (includes 150 km of expressways) (2007)
Slovakia
total: 43,761 km
paved: 38,085 km (includes 316 km of expressways)
unpaved: 5,676 km (2006)
Slovenia total: 38,709 km paved: 38,709 km (includes 579 km of expressways) (2007)
Solomon Islands total: 1,360 km paved: 33 km unpaved: 1,327 km note: includes 800 km of private plantation roads (2002)
Somalia
total: 22,100 km
paved: 2,608 km
unpaved: 19,492 km (2000)
South Africa
total: 362,099 km
paved: 73,506 km (includes 239 km of expressways)
unpaved: 288,593 km (2002)
Spain
total: 681,224 km
paved: 681,224 km (includes 13,872 km of expressways) (2006)
Sri Lanka
total: 97,286 km
paved: 78,802 km
unpaved: 18,484 km (2003)
Sudan
total: 11,900 km
paved: 4,320 km
unpaved: 7,580 km (2000)