A 67-year-old Wentworth Falls woman was killed when her car left the highway and hit a tree in wet weather on Tuesday last week.
Police said initial investigations suggested the Toyota Landcruiser 4WD, which was travelling east during heavy rain, left the road and crashed into a tree near Sinclair Crescent.
The driver of the car, Georgia Tyler, died at the scene.
The passenger, a 17-year-old boy, was treated at the scene by Ambulance Paramedics, before being taken to Nepean Hospital with minor injuries.
The accident happened on the same section of road where a 39-year-old electrician was killed, also in wet weather, in December 2013. On that occasion, Brendan Robson, a Wentworth Falls father of seven, was involved in a head-on collision after he aquaplaned on a corner near the Crematorium.
Several people posted on Facebook that the area was notorious for its bad drainage.
One, Marg Golledge, wrote: “I have aquaplaned along that stretch of road, more than a year ago now. You have to be so careful, it can happen so easily.”
The Gazette asked the RMS if it would consider erecting signs warning people to be take care in the wet.
A spokeswoman for the RMS responded: “Roads and Maritime Services will continue to work with NSW Police and investigate any improvements required to drainage on this section of the Great Western Highway.
“Motorists should slow down and drive to the conditions during wet weather.”