The project national road 509 Sømmebakken — Sola school is a continuation from project national road 509 Sømmevågen — Flyplassvegen, and it is the start of transport corridor West. The lot length is approx. 1 km, from profile -55-1030.

The main aim is to improve access to the port area in Risavika and Sola airport.

The project shall be constructed as a dual carriageway with a footpath on both sides. The total road width with the footpaths is approx. 34m.

There will be comprehensive relaying/new construction of water and sewage installations. The drainage from the road shall be led to a sedimentation basin/treatment basin before it is emitted to Havsfjord's inner basin area. There will also be major alterations for the cable departments, in particular Lyse, which also has important gas and high voltage lines in the area, which must be relaid.

Areas of archaeological interest have been uncovered along the planned road route, and these have been excavated. The project will be based on drawings and road models.

Main quantities:

— Mass removal of soil in the line: 13 500 m3;

— Soil for the filling site: 15 400 m3;

— Pipe ditches: 5 300 metres;

— Cable ditches, including OPI channel: 4 520 m;

— OPI channel, width approx. 1,75 m and height approx. 0,5 m: 1 000 m;

— Reinforcement layer, 22/120: 28 770 m3;

— Base course, 0/32: 8 000 m3;

— Base course Ag16, 13 cm: 22 600 m2;

— Asphalt cover, national road 509 wearing course, Ska and binder, Ab: 22 600 m2;

— Asphalt cover other roads and foot/cycle paths, wearing course and binder Agb: 24 600 m2;

— Noise reduction screens: 4 600 m2;

— Kerbstones: 4 100 m;

— Light masts: 190;

— Railings, sicuro: 4 400 m;

— Demolition of asphalt cover: 20 000 m2.

Subway and supporting walls:

— Casting: 1 850 m3;

— Reinforcement: 305 tons;

— Laid matter, blasted stone: 2 910 m3;

— Filling, crushed matter: 7 300 m3;

— Form-work: 4 350 m2.

Sedimentation basin:

— Casting: 345m3;

— Reinforcement: 8,4 tons;

— Excavation of uncompacted matter: 4 400 m3;

— Laid matter, blasted stone: 1 500 m3;

— Filling: 950 m3;

— Form-work: 440 m2.