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: 1000 m
— Reinforcement layer, 22/120: 28 770 m³
— Base course, 0/32: 8000 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: 4400 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
— Formwork: 4 350 m²
Sedimentation basin:
— Casting: 345 m³
— Reinforcement: 8.4 tons
— Excavation of uncompacted matter: 4 400 m³
— Laid matter, blasted stone: 1 500 m³
— Filling: 950 m³
— Formwork: 440 m².