N1 National Highway, 6-lane Extension Härkingen-Wiggertal
Project
- 6-lane extension between the Härkingen and Wiggertal junctions
- Subdivision into lots with “preliminary works” and “main works”
- Extension while maintaining traffic operation
Helbling services
- Second opinion on the “preliminary works” tender documents
- Second opinion on the “main works” tender documents
- Recommendations for action for construction owner and construction management
- Risk assessments and action plan
Key project figures
- Construction costs: approx. CHF 230 million
- Helbling processing period: November 2010 - May 2011
Customer: Bundesamt für Strassen, ASTRA
