UPDATE 11.25: THE female driver of a Mitsubishi SUV involved in a multi-vehicle collision on the Pacific Highway at Ewingsdale remains in a critical condition in Tweed Heads hospital.
A police media spokesman said emergency services were called to the scene of a crash involving two trucks and two cars at about 1.30pm yesterday.
The spokesman said a southbound Volvo semi towing a car carrier trailer left the road and went into a table drain before it returned to the road and side swiped a northbound Kenworth prime mover carrying cement dust.
The spokesman said the Volvo car carrier then smashed into a Mitsubishi ASX, which was then pushed into a Holden Astra.
The 65-year-old female driver of the Mitsubishi suffered serious abdominal and pelvic injuries and was taken to Tweed Heads hospital in a critical condition.
Ambulance NSW Brunswick Valley Zone Inspector Greg Powell said the woman underwent surgery last night for serious internal injuries.
Insp Powell said she remains in Tweed Heads hospital in a critical condition.
A 70-year-old man, who was a passenger in the Mitsubishi, was taken to Tweed Heads hospital in a stable condition suffering fractured ribs and severe bruising to the neck and chest.
The 42-year-old driver of the Volvo car carrier was airlifted by the Westpac Life Saver Rescue Helicopter to Gold Coast hospital in a critical condition with fractures to legs and hips.
Insp Powell said the truck driver had been cleared of any serious pelvic injuries.
Northbound traffic on the highway was diverted via Mullumbimby while the North Coast Crash Unit investigated the incident.
Tweed Byron Local Area Command duty officer Inspector Jim Cain said the highway was reopened to traffic in both directions at about 1.30am.UPDATE 8.45am: THE Pacific Highway is again flowing in both directions after a serious crash at Ewingsdale yesterday afternoon.
A man and a woman were taken to hospital in a critical condition following the crash involving two trucks and two cars.
Ambulance NSW Brunswick Valley Zone Inspector Greg Powell said emergency services were called to the crash about 100m north of the Byron Bay turnoff at about 1.30pm yesterday.
"When paramedics arrived they found a driver was trapped in one of the trucks and a driver was trapped in one of the vehicles," he said.
Insp Powell said paramedics assessed four patients at the scene.
"The driver of the car, a woman in her late 60s, was taken by ambulance to Tweed Heads hospital in a critical condition, with abdominal and pelvic injuries."
Insp Powell said the truck driver, a man in his 40s, was trapped for about 90 minutes.
"He was airlifted by the Westpac Life Saver Rescue Helicopter to Gold Coast Hospital in a critical condition, with serious leg, head and pelvic injuries."
A third patient was taken to Tweed Heads hospital with rib injuries.
The crash forced traffic diversions late into the night with the Transport Management Centre only reporting this morning that the road had been fully cleared.
Anyone with any information on the crash is urged to phone Crime Stoppers on 1800 333 000.
Wednesday, February 19, 2.43pm: TWO people are in a critical condition following a crash on the Pacific Highway about 100 metres north of the Byron Bay turnoff.
A NSW Ambulance media spokeswoman said a 70-year-old woman and another patient were in a critical condition.
The spokeswoman said the woman and another patient had been taken to Tweed Heads hospital.
The driver of a truck, who was trapped following the crash, has been released.
Light vehicles travelling north on the highway are being diverted into Myocum Road, then Coolamon Scenic Drive through the township of Mullumbimby to rejoin the highway via Mullumbimby Road and Gulgan Road.
This diversion is not suitable for heavy vehicles, which are being parked on the highway.
Southbound motorists are able to divert around the accident site by taking the Ewingsdale Road exit to Byron Bay, then travelling through the roundabout to rejoin the highway.
Motorists are advised to postpone any unnecessary travel and avoid the area if possible.
UPDATE 2.18pm: A NSW Ambulance spokesman said paramedics are on the scene of the crash and are treating three patients.
Two patients have serious injuries and are being treated by paramedics, while the condition of the third patient is not known.
Despite earlier suggestions a child was trapped in one of the vehicles, NSW Ambulance says there are no children among the injured.
The Ballina Crash Investigation unit has been called to the scene.
Northbound light vehicle traffic is being diverted via Myocum Rd at St Helena and will be able to return to the highway via Kennedys Lane.
Heavy vehicle traffic is being stopped at St Helena by police and asked park on the side of the highway.
Anyone travelling south on the highway past Ewingsdale is advised to take the Byron Bay exit and go around the roundabout and back onto the highway.
UPDATE 2pm: The Westpac Life Saver Rescue Helicopter has been sent to help victims of a crash involving two trucks and several cars on the Pacific Highway at Ewingsdale.
Northbound lanes of the highway are blocked following the crash, which happened just after 1.30pm.
There are conflicting reports on whether the southbound lane is also closed.
A truck driver and a female passenger in one of the cars are reportedly trapped.
There were suggestions earlier at least one child is also trapped. However, this has not been confirmed.
Police, paramedics, volunteer rescue units and NSW Fire and Rescue have responded.
Traffic travelling southbound is advised to take the Byron Bay exit and go around the roundabout and back onto the highway.
1.47pm: EMERGENCY services are responding to reports of a crash between a car and a truck on the Pacific Highway at Ewingsdale.
Initial reports from the scene indicate three people are trapped in the car, including children.
Police, paramedics and rescue units are on the way.
The Transport Management Centre is reporting traffic is affected in both directions.