A 100 kilometre zone on Remembrance Driveway will be reduced to 80 kilometres to improve driver safety.
The speed limit will drop for four kilometres between Jarvisfield Road, Picton and Old Razorback Road, Razorback.
A Roads and Maritime Services spokesman said the change will take place Tuesday, June 27.
“Roads and Maritime reviewed the speed zone after concerns were raised by local residents,” he said.
“A speed reduction was deemed appropriate due to the crash rate, road conditions and to improve consistency along Remembrance Driveway to create a safer road environment.
“In the five years to December 31, 2015, there were 14 crashes on this section including one fatality.”
On social media the news sparked heated debate with many commenters objecting to the reduction.
Madison Hope took to the Wollondilly Living community page to vent her frustration.
“There just seems to be more and more punishment to people that can drive and are actually capable of doing the speed limit,” she said.
Wollondilly councillor Michael Banasik also took to Facebook to say the RMS was responsible for the change and acknowledged several accidents had occurred on that stretch of road.
“Sure our roads need to be a better standard,” he said.
“But with population increase and more traffic, safety comes first.”
Electronic message signs will be installed on Remembrance Drive a fortnight before and after the change to advise motorists of the new reduced speed limit.