| Rank | Country | Roadways |
208 | Saint Helena | total: 198 km (Saint Helena 138 km, Ascension 40 km, Tristan da Cunha 20 km) paved: 168 km (Saint Helena 118 km, Ascension 40 km, Tristan da Cunha 10 km) unpaved: 30 km (Saint Helena 20 km, Ascension 0 km, Tristan da Cunha 10 km) (2002) |
202 | Saint Kitts and Nevis | total: 320 km |
184 | Saint Lucia | total: 910 km paved: 48 km unpaved: 862 km (2000) |
| Saint Martin | void |
214 | Saint Pierre and Miquelon |  total: 117 km paved: 80 km unpaved: 37 km (2000) |
187 | Saint Vincent and the Grenadines | total: 829 km paved: 580 km unpaved: 249 km (2003) |
170 | Samoa | total: 2,337 km paved: 332 km unpaved: 2,005 km (2001) |
215 | San Marino | total: 104 km paved: 104 km (2003) |
203 | Sao Tome and Principe | total: 320 km paved: 218 km unpaved: 102 km (2000) |
29 | Saudi Arabia | total: 167,600 km paved: 46,500 km unpaved: 121,100 km (2006) |
127 | Senegal | total: 13,576 km paved: 3,972 km (includes 7 km of expressways) unpaved: 9,604 km (2003) |
89 | Serbia | total: 36,875 km paved: 31,392 km unpaved: 5,483 km note: roadways in Kosovo listed separately (2006) |
195 | Seychelles | total: 458 km paved: 440 km unpaved: 18 km (2003) |
134 | Sierra Leone | total: 11,300 km paved: 904 km unpaved: 10,396 km (2002) |
164 | Singapore | total: 3,262 km paved: 3,262 km (includes 150 km of expressways) (2006) |
84 | Slovakia | total: 42,993 km paved: 37,533 km (includes 316 km of expressways) unpaved: 5,460 km (2004) |
87 | Slovenia | total: 38,558 km paved: 26,755 km (includes 505 km of expressways) unpaved: 11,803 km (2006) |
177 | Solomon Islands | total: 1,391 km paved: 34 km unpaved: 1,357 km (2000) |
106 | Somalia | total: 22,100 km paved: 2,608 km unpaved: 19,492 km (2000) |