A 57-year-old man is being transported to hospital after suffering a 'medical incident' on Princes Tower Road.
The road is now open, but the incident has led to major traffic congestion at the Five Oaks roundabout.
Roadworks are currently taking place in the area. The incident didn't happen on the roadworks, but on the diversion route.
The Emergency Services have been on the scene helping the casualty.
Motorists are asked to avoid the Five Oaks roundabout if possible.


Princess Anne unveils new portrait of King Charles and Queen Camilla
What to expect from Bergerac Series Two
Lee Ingram appointed JFA President
Economists warn Jersey's government to save more money
Trash the trimmers, try a tash!
Man investigated for indecent exposure and urinating in the street
Guernsey could be disgraced Andrew’s new home - Royal biographer
Government appoints new Havre Des Pas Lido operator