Harbour Bridge lanes reopen, traffic heavy

All lanes on the Sydney Harbour Bridge have reopened, but city traffic remains heavy.

Two northbound lanes on the bridge were briefly shut on Friday evening after a small fire broke out near train tracks on the deck of the bridge.

All lanes are now open, but traffic remains extremely heavy and is queued back to the Anzac Bridge.

The Transport Management Centre says traffic in the Sydney CBD is also very heavy, so motorists should allow plenty of extra travel time and expect significant delays.