ONE man has died and six people have been hospitalised after four separate crashes across the Northern Rivers.
A 49-year-old Brisbane man died when his quad bike rolled over on a Lynches Creek property near Kyogle.
Police were alerted after a neighbour found the body of the 49-year-old man about 9.20pm.
A report will be prepared for the Coroner.
Cyclist injured in "pea soup" fog
Another 49-year old man underwent major surgery and remains critical after a car hit him as he cycled west on the Bruxner Highway near Lismore in thick pre-dawn fog on Saturday morning.
The cyclist was hit by a westbound Holden Commodore station wagon at South Gundurimba at about 5am.
The crash forced the closure of the highway while paramedics stabilised the man's condition and police examined the scene.
The incident, the second serious crash involving a cyclist in less than a week, has prompted a warning from police about the dangers of cycling in the dark.
Richmond Local Area Command Inspector Doug Connors urged cyclists to "strongly consider the road and weather conditions".
"Cycling in a pea soup fog, on a highway, at night, is extremely dangerous," he said.
The 48-year-old male driver of the Holden and his 51-year-old wife, both from Casino, were not injured in the crash.
Ocean Shores head-on
Meanwhile, a serious head-on crash at Ocean Shores on Friday night saw three people taken to Tweed hospital, with one last night remaining in a critical condition.
Tweed Byron police acting Inspector Chad Deegenaars said the crash occurred about 8.15pm when a Ford ute was travelling north on the Brunswick Valley Way toward a southbound white Hyundai sedan.
"While negotiating a right hand turn, the driver of the Hyundai veered to the right across double unbroken lines, colliding head-on with the Ford utility," he said.
Act Insp Deegenaars said the three people were treated at the scene by paramedics before being taken to Tweed Hospital.
"The 22-year-old male driver of the Hyundai suffered internal injuries," he said.
"The male driver of the ute suffered a fractured sternum and the female passenger suffered minor injuries."
The Hyundai driver, who police believe is a Chinese national, remains in Tweed Hospital in intensive care.
"Police are investigating whether the driver of the Hyundai may have been distracted by a device in the vehicle," Acting Insp Deegenaars said.
On Saturday afternoon a crash occurred at Tuncester at the intersection of Kyogle Rd and Rifle Range Rd between two four-wheel drives and a station wagon.
Paramedics treated three people at the scene including a 65-year-old woman treated for a chest injury, and 60-year-old woman who was transported to Lismore Base Hospital in a stable condition with multiple injuries.
The weekend of road carnage follows the tragic deaths on Friday morning of Lismore mother Nicole Taylor, 40, and her 12-year-old daughter Darcie Storer on the Pacific Highway at Kundabung near Kempsey.
Ms Taylor's 47-year-old husband, and their 14-year-old daughter, who were also injured in the crash, have since been discharged from Port Macquarie Hospital
The 43-year old male driver of the furniture truck also involved in the collision remains in John Hunter Hospital in Newcastle in a serious but stable condition.