The 25-mile route, which was first opened in 1994, was in need of repairs after the original surface began to slowly deteriorate.
Upgrade schemes included replacing a 400-metre stretch of land at Trottick Ponds, which was partly funded by Sustrans and Tactrans' Active Travel Grant.
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Further upgrades include resurfacing at Riverside Drive, Mill o Mains Park, Lower Broughty Ferry Road and Balmuir near Trottick and by replacing signage.
The Green Circular is surveyed every year, and plans for improvement are prepared when appropriate.
Councillor Kevin Cordell said: "The improvements will be invaluable to walkers and cyclist at Trottick Ponds.
"I hope that the improvements will encourage more people to come and enjoy the amazing green space we have the city. A special thanks to Sustrans and Tactran and their contribution to the project."
(LM/JP)
