The £300M bored tunnel was constructed in two years. Mott MacDonald designed the dual-purpose section of 9.7km-long, 11.8m-diameter tunnel, and provided specialist consultancy for tunnelling overall (NCE 13 September).
Mott MacDonald head of tunnelling Arthur Darby said: "The idea for the tunnel came first, followed by the idea to use it for a road as well.
"It's pretty pleasing to work through these things. It was done in a short period of time, which made it more exciting for all the people involved."
Construction Project of the Year, went to Kier Construction for its work on Dubai Drydocks. These works to upgrade and extend the operational life of one of the busiest ship yards in the world were carried out in a fully operational dock environment and were completed on time and to budget.
A new award for sustainability was given to WYG International for work on the development of European-Turkish Business Centres in Turkey.