A Guy Fawkes Carnival cart and illuminated cyclists were first to travel down Bridgwater's newest road last night.
The new £18 million Squibbers Way links Marsh Lane to Parrett Way.
The name - chosen through a competition - reflects the town's unique carnival tradition of holding a type of firework and last night's ceremony involved a squibbing display.
Squibbers Way, previously referred to as the Colley Lane Southern Access Road, is designed to help ease congestion along Taunton Road and Broadway by providing an alternative route from the M5 for lorries serving the Colley Lane estate.
The road also opens up brownfield land in the area for development, supporting the delivery of planned housing and employment land.
Councillor John Woodman, Somerset County Council Cabinet Member for Highways, who took part in the squibbing, said: "This was a fantastic occasion and a fantastic way to celebrate the opening of Squibbers Way.
"Squibbing is unique to Bridgwater and we’re thrilled to have been able to listen to the public and literally put squibbing on the map.
"This new road will make such a difference to so many across Bridgwater by taking lorries off Taunton Road.
Whitemountain’s Project Manager on Squibbers Way said: "The Whitemountain team have enjoyed delivering this intricate, complex and challenging civil engineering project.
" We have worked with and fundraised for many local charities such as The Brainwave Centre and Bridgwater Foodbank. We would like to take this opportunity to thank the town of Bridgwater for welcoming our team to the community, and enjoyed a professional working relationship with the Somerset County Council Team."
Mike Crocker, President of Bridgwater Guy Fawkes Carnival Committee, said "Our carnival and its associated activities continue to increase in popularity every year, and having a road named after our squibbing tradition is fantastic recognition.
"The fact the road was voted for and named by members of the public just goes to show how proud local people are of Bridgwater Carnival and its colourful history, and I would like to personally thank everybody who voted for Squibbers Way."