Cost Benefit Analysis of Stad Shipping Tunnel

Cost Benefit Analysis of Stad Shipping Tunnel


T Tørset, S Meland, D Bertelsen, SINTEF, NO


The Norwegian Coastal Administration has drawn up plans to build the world's first shipping tunnel for vessels passing Stad peninsula.
Several interesting differences between making CBAs for land- and sea transport emerged.


The Norwegian Coastal Administration has drawn up plans to build the world's first shipping tunnel for vessels passing Stad peninsula.

Last year we carried out a comprehensive cost benefit analysis of the 1750 meters long shipping tunnel with inner measures of up to 37 meters high from the water level, 12 meters deep and 36 meters wide. The explanation of the huge size is that the Coastal Steamer should be able to use it. Potential users are also freighters, fishing boats, other passenger ships and leisure boats.

The Stad area just outside the peninsula has sea which is very unpredictable. The floor conditions with shallow banks close to shore and then very much deeper sea outside of that again, result in waves breaking in several directions, causing rough and difficult sailing conditions. The difference in depth could also create difficult waves a long time after rough wind, and then often as a surprise to the visitor seafarers who typically only would take the current wind conditions into account when they consider where they choose to go. The bad and unpredictable weather conditions, represents a huge barrier for the smaller boats. The bigger tankers would typically choose a shipping lane further out in the sea where the sea is deeper and the waves more stable.

Elements evaluated in the cost benefit analysis were:
? Increased Safety and security at sea
? Reduced waiting time for vessels
? Increased predictability and regularity for freight
? Increased availability and collective benefits
? Transfer of goods from land to sea
? Potential for the tourist industry in Western Norway

Passenger transport was estimated using a rather traditional transport model. The other sea transport was reported from Automatic Identification System for larger ships. Some of the smaller boats had GPS and was registered as part of their safety system. The smallest leisure boats were roughly estimated though information from the rescue boats. They run an escort service for leisure boats passing Stad peninsula in both directions the three summer months.

The methods used in the cost benefit analysis was basically done in the same way as it would have been done if the planned action was initiated to improve the conditions for land transport. We found that there were differences between land and sea transport, some of which we could account for, and some we couldn?t handle properly. Examples are:

? The assessment of the new public transport service
? The assessment of anxiety and incidents like near accidents
? The travel time for boats depending on the weather conditions
? The choice patterns practiced on board different boats regarding when to travel, which speed and which shipping lane to chose
? The climate change and its effect on the weather and sailing conditions


Association for European Transport