When it opened it was claimed South Devon would get 8,000, with 3,500 of those in Torbay.
But campaigners say they believe more people now commute out of the area for work as a result of the road. They submitted a freedom of information request and were told that data on the road - and the number of jobs it's creating - isn't being monitored.
Paul Raybould is the branch secretary of Torbay's GMB Union, and also the South Devon TUC.
He said: "In the FOI response Torbay Council state 'this information does not exist'.
"I wonder how the council proposes to monitor the statement on the South Devon Highway website that 'The improved access to Torbay and South Devon is expected to bring lasting economic benefits, leading to the creation of nearly 8,000 jobs in South Devon, with around 3,500 of these in Torbay'?
"Where is the evidence that the South Devon Highway has brought lasting economic benefits to Torbay and where are the 3500 jobs going to come from?
"It would seem not knowing or saying the South Devon Highway has helped business is evidence of the failure to achieve anything like the figures suggested?"
In response Torbay's Mayor Gordon Oliver has defended the £110-million road - 100 yards of which is in Torbay the rest in the Devon County Council area.
He said: "Unemployment in Torbay is at the lowest it’s been since the early 1970s and there's job shortages now in some sectors here."
Responding to the Mayor’s comments, Mr. Raybould said, “They are words of an out of touch mayor. At the end of the day more people depart Torbay in the mornings and head up the A380 because of lack of decent employment opportunities in the Bay. That road has not brought the inward investment which will bring full time well paid jobs we were promised”.
Mr Raybould added, "We ran a Campaign that started in 2010 for a Referendum to end elected mayor status in Torbay that was a personal crusade from Paul that finally materialised in 2016. The public got a vote and the status ends in 2019. That gives one man rule the end it deserves".
Thank you to The Breeze Radio for the majority of the above report