On Tuesday, Masters Road westbound and two of four northbound lanes on Springhill Road were closed for hours after a coal truck overturned, spilling its load.

The male driver involved was taken to Wollongong Hospital suffering minor injuries.

Masters Road in particular has long been a thorn in the side of residents and local politicians, and in 2008 the RMS removed the right-hand turn into Drummond Street in an attempt to reduce the number of crashes.

However, accidents have continued at the intersection of Springhill Road and Masters Road, and between 2007 and 2013 there were at least 30 crashes.

An RMS spokeswoman said that in 2012 there were five crashes at the intersection, which injured six people. Of these, one crash involved a heavy vehicle.

Initial data from 2013, which the RMS is yet to finalise, showed at least one crash occurred at the intersection, with one person injured.

Ms Hay said more needed to be done to reduce the crash rate. "Clearly ... RMS needs to look at what can be done to improve the movement of traffic should an accident occur, and focus more on whether speed is a factor," she said.

She said widening Masters Road was an option.

In November last year, RMS established red light speed cameras at the intersection.

They were switched to "warning mode" in December, and are yet to become fully operational.

"All new red-light speed camera locations operate in warning mode for at least four weeks prior to moving to full infringement mode," the RMS spokeswoman said. "Warning letters are sent to motorists who are detected speeding or running red lights during the warning mode period.

"The red-light speed cameras installed at the intersection of Springhill Road and Masters Road began operating in warning mode from mid December 2013 and have not yet commenced issuing infringements."

Ms Hay said a warning period of four weeks wasn't good enough, describing it as "ludicrous".