Upgrading the main road between Arbroath and Dundee has made the route safer and boosted the economy, it has been claimed.
Dualling the A92 has cut accidents and traffic on minor roads and improved journey times, said Angus Council.
The authority said the number of inquiries from businesses looking to move to or relocate within Arbroath went from 33 in 2004 to 76 last year.
The town's house prices have also risen by 25% since September 2005.
Angus Council's infrastructure convener, David Selfridge, said: "The new stretch of dual carriageway has transformed the route. Most importantly it's safer and it is now a smoother journey."
Traffic flow on the A92 has increased by about 5% since the upgraded road opened to traffic in 2005, said the council.