Sydney's Cahill Expressway has been reopened to southbound traffic after emergency services cleared a truck that had earlier rolled and spilled its load.
However, motorists driving from Sydney's north are warned to expect ongoing lengthy delays to their journeys into the central city, while buses are running up to an hour late. Transport officials also warned people travelling to the Coldplay concert at Allianz Stadium at Moore Park to take public transport instead of driving.
More NSW News Videos
- Video duration
- 00:29
6km traffic jam after truck rollover
6km traffic jam after truck rollover
A truck carrying soil and rocks has turned over on the Cahill Expressway. Vision: Seven News
Up Next
How will Eddie Obeid be remembered?
- Video duration
- 02:48
- Video duration
- 02:48
How will Eddie Obeid be remembered?
How will Eddie Obeid be remembered?
A look back at the colourful history of former NSW Labor powerbroker Eddie Obeid.
Up Next
HSC 2016: Top of the state
- Video duration
- 02:26
- Video duration
- 02:26
HSC 2016: Top of the state
HSC 2016: Top of the state
Students from across NSW have shared the honours at the HSC First in Course awards.
Up Next
Sydney cooks in scorching heat
- Video duration
- 02:24
- Video duration
- 02:24
Sydney cooks in scorching heat
Sydney cooks in scorching heat
Several bushfires continue to threaten homes in Cessnock as Sydney suffers for the second day running with record-breaking heat.
Up Next
Near-miss during Sydney's Big Boat Challenge
- Video duration
- 00:25
- Video duration
- 00:25
Near-miss during Sydney's Big Boat ...
Near-miss during Sydney's Big Boat Challenge
Video taken from on board the Beau Geste/Cloudy Bay shows the moment super maxi Scallywag nearly collided with a traffic patrol boat during Tuesday's race on Sydney Harbour. Video courtesy of Lisa Ratcliff.
Up Next
Bushfires burn out of control in NSW
- Video duration
- 01:00
- Video duration
- 01:00
Bushfires burn out of control in NSW
Bushfires burn out of control in NSW
Firefighters tackle two out of control blazes threatening homes in New South Wales.
Up Next
Sydney breaks heat record for December
- Video duration
- 02:23
- Video duration
- 02:23
Sydney breaks heat record for December
Sydney breaks heat record for December
Sydney residents struggle as temperatures soar across New South Wales.
6km traffic jam after truck rollover
A truck carrying soil and rocks has turned over on the Cahill Expressway. Vision: Seven News
The truck, which was carrying dirt, overturned on the southbound on-ramp from the Cahill Expressway to the Domain Tunnel just before 1.45pm.
Its rear trailer tipped sideways, tipping dirt and debris onto several lanes.
As a result, the Cahill Expressway and the Sydney Harbour Tunnel were closed southbound, while northbound traffic on the Eastern Distributor was congested.
The Transport Management Centre (TMC) said traffic was "extremely heavy" after the crash across parts of the city, including the Sydney Harbour Bridge.
Motorists queued for 6 kilometres from the Harbour Bridge to the Lane Cove Tunnel, and past Military Road over the Spit Bridge.
"As a result, motorists should avoid driving towards the city from the northern beaches, lower north shore and the Hills areas," a TMC spokeswoman said.
"Motorists should continue to allow plenty of extra travel time and expect lengthy delays."
Shortly before 3pm, southbound lanes in the Harbour Tunnel were reopened to traffic, as were those on the Cahill Expressway about an hour later.
However, an exit from the expressway to Macquarie Street remained closed to allow workers to clear sand spilled onto the road from the truck.
Some buses heading to the city stopped travelling over the Harbour Bridge for a time, ending their journeys at North Sydney station.
While buses resumed travelling over the bridge after 4pm, services were running up to an hour late.
All buses that normally travel over the Harbour Bridge now start & end their trips at North Sydney. Catch the train
— Buses North (@BusesNorth) December 14, 2016
https://t.co/6vrbBXZFlf
Commuters were advised to catch a train.
Just before 2.30pm, the truck's trailer was put back onto its wheels by a heavy tow truck and emergency services and moved out of the way.
However, the delays are expected to continue for some time.