Twelve separate incidents of major delays on the M5 over the Summer have had a huge cost to the region's economy.
Calculations by the Devon and Cornwall Business Council have estimated the loss of trade as up to £75 million.
Products stuck in traffic jams, associated delays on neighbouring roads and the impact on tourism have all been taken into consideration.
One business that's been directly affected is the Ministry of Cake factory. For them the dualing of the A303 and A358 would be a recipe for success. The firm's main production base is in Taunton so it's ideally located to use the improved road.
But with lorries bringing in perishable ingredients and taking out cakes for distribution across the UK and Europe, lengthy delays on the M5 can lead to the factory grinding to a halt.
During the last 3 months researchers identified 12 situations where there were delays of 5 or more hours on the M5 into the region, 3 were for more than 10 hours.
The conclusion is that this has cost businesses in Somerset, Devon and Cornwall between £50 to £75 million. An improved A303 and A358 at a cost of £2 billion to upgrade would by Government calculations provide an uplift to the South West economy of £40 billion.
The Devon and Cornwall Business Council believes the buzz coming out of Government is that in the Chancellor's Autumn Statement next month the road will finally get the green light to begin.