| Route 40 | |
|---|---|
| Hafnarfjarðarvegur | |
| Major junctions | |
| Northern end: | 41 Sæbraut |
| 49 Miklabraut | |
| Southern end: | 41 Reykjanesbraut |
| Highway system | |
| National Roads in Iceland | |
Route 40, known as Hafnarfjarðarvegur in Icelandic or by its busiest stretch, Kringlumýrarbraut, is one of the two major traffic arteries running across Capital Region.