| Status | Road | Name | District | Length | Lighting | Alternative Route |
 | 15 | Smyskorane | Sogn og Fjordane | @330m | Yes | |
 | E16 | Songstad I | Hordaland | 279m | ? | Go around the tunnel. |
| E16 | Songstad II | Hordaland | 310m | ? | Go around the tunnel. |
| E6 side road | Sorgendal | Oppland | 278m | ? | Go via the local road. |
 | New E10 | Sørdalstunnelen | Nordland | | ? | |
| 755 | Spranget? | Nord Trøndelag | @200m | Yes | |
| 110 | St. Hansfjellet | Østfold | 158m | ? | There are several alternative routes around this tunnel. |
| 94 | Stallogargo | Finnmark | 2298m | Yes | |
| 23 | Stampeleinås | Buskerud | 375m | ? | Go via the Rv65/ Kv/ Fv11/Kv Bjørnstad - Verpen. |
| E16 | Stavenes | Hordaland | ? | ? | The suggested alternative is to take the train between Trengereid and Stanghelle. |
| E6 | Stavsjøfjelltunnelen | Sør Trøndelag | 1720m | ? | Go via the old E6 Skovgård - Malvik - Stjørdal. |
 | 835 | Steigen | Nordland | ? | ? | |
| E18 | Steinbrekka | Telemark | 184m | ? | Go via the old E18. |
| 773 | Steinfjellet | Nord Trøndelag | ? | ? | |
| 862 | Steinfjord | Nordland | 1265m | Yes | |
| 827 | Stetind | Nordland | @ 2620m | ? | |
| E7 | Stiganes | Hordaland | 351m | ? | Go around the tunnel. |
| 331 | Stokkenesberget? | Sogn og Fjordane | @300m | None. | |
| 562 | Stongafjell | Hordaland | 694m | ? | Go around the tunnel. |
| 650 | Stordalstunnelen | Møre og Romsdal | 3530m | Yes | It looks like there is a road around this tunnel on Google maps, but it dead-ends, so there is no alternative. |
| E7 | Storegjel | Hordaland | 842m | ? | Go around the tunnel (summer only). |
![]() | 13 | Storehaug | Sogn og Fjordane | 1044m | Yes | |
| 150 | Storo | Oslo | 136m | ? | Go via the local road/ cycle path. |
| 17 | Storvikskar | Nordland | 3100m | Yes | |
| 17 | Straumdal | Nordland | 3232m | Yes | |
| E134 | Strømsås | Buskerud | 3750m | ? | Go via the Rv 282 / Fv 35. |
| 5 | Sundafjelltunnelen | Sogn og Fjordane | 1883m | Yes | |
| 17 | Sundfjord | Nordland | 750m | Poor | |
| E6 side road | Svartdal | Oslo | 1391m | ? | Go via the local raod/ cycle path. |
| 862 | Svartholla | Nordland | 310m | Yes | |
| 17 | Svartisen | Nordland | 7615m | ? | Go via the Fv 452 (Halsa - Vassdalsvik) and ferry (Vassdalsvik - Ørnes). |
| 555 side road | Sydnes | Hordaland | 384m | ? | Go around the tunnel. |
| E16 | Takvam | Hordaland | 111m | ? | Go around the tunnel. |
| 150 | Tåsentunnelen | Oslo | 1284m | ? | Go via the local road/ cycle path. |
| 331 | Teigastølen? | Sogn og Fjordane | 900m | None | None, except to take rv55 on the other side of the fjord. |
| E18 | Telemarksporten | Telemark | 270m | ? | Go via the old E18. |
| 166 | Teleplanbygget | Akershus | 157m | ? | Go via Lysaker centre. |
| 76 | Tosen | Nordland | ? | ? | |
| E16 | Trengereid | Hordaland | 1773 m | Yes | Either cycle Trengereid-Norheimsund-Voss or take the train Trengereid-Vaksdal-Stanghelle. Or, at your own risk, use the Raudbergtunnelen and continue to Vaksdal via the track of the old railway (a very rough track with unlit old railway tunnels). |
| 553 | Troldhaug | Hordaland | 471m | ? | Go around the tunnel. |
| 862 | Tromso Lufthavn | Nordland | ? | ? | |
| E8 | Tromsøysund | Troms | 3500m | ? | Go over the Tromsøbrua. |
| E39 | Tronvik | Rogaland | 202m | ? | ? |
| 35 | Tunnel on Rv 35 | Oppland | 3000m | ? | Probably banned. Go via Helleren - Oppdalen. |
| E39 | Utnes | Hordaland | 263m | ? | Go around the tunnel. |
| 354 | Vabakken | Telemark | 566m | ? | Go via the local road. |
| E134 | Vågslidtunnelen | Telemark | @1700m | ? | Over the old road. |
| 658 | Valderøytunnelen | Møre og Romsdal | 4222m | ? | ? |
| 190 | Vålerengtunnelen | Oslo | 831m | ? | Take the cycle path. |
| E7/13 | Vallavik | Hordaland | 7510m | ? | Go via the Rv 572 Bruravik - Ulvik - Holven. |
