Divers from the Tavua Reef Institute have planted more than 90,000 coral fragments over six years, and fish numbers on the restored sections are approaching those of healthy reefs nearby.
The two hill towns are restricting access to residents, deliveries and emergency vehicles, and visitors will park outside the walls and walk or take an electric shuttle.
Forty-two acts, two stages and no ticket barrier: the city's biggest free music weekend began last night on Old Quay, with organisers expecting more than 40,000 visitors before the final encore.
Alongside its usual programme in the Asher Arts Centre cinema, this year's Film Week is putting up a giant screen on the Harbourside quay for six free evening shows.