Project
N-135 Road, Erro and Mezkiritz Tunnels
- Client:
- Government of Navarra
- Date:
- 2008-2012
- Location:
- Navarra, Spain
- Services:
- Planning and Consultancy
- Engineering Design
- Key disciplines:
- Motorways and Roads
- Road Engineering
- Traffic Studies
- Tunnels
The N-135 road links Pamplona to France via Luzaide/Valcarlos and is 62 km in length. The “Erro and Mezkiritz Tunnels” project considers alterations to two sections of the N-135, maintaining a design speed of 100 km/h. The work was carried out in two phases: preliminary design and detailed design.
The first of the sections, between Zubiri and Erro, is 6.8 km in length and crosses the Erro pass through a 2.3 km tunnel, a 150 m viaduct and 4 intersections. The second section, 2.5 km in length, alters the existing route in the final part of the Mezkiritz pass with a second tunnel 0.5 km in length and 3 intersections.