The original design included a heavy vehicle off ramp that directly linked onto Mt Ousley Road.

Residents had concerns that approach speeds to the roundabout at the Gaynor Avenue intersection from eastbound trucks would be too high.

Roads and Maritime Services agreed and has altered the interchange plan so as to reduce the speed of heavy vehicles travelling east along Mt Ousley Road.

“The design has been refined to increase the length of the central island of the Gaynor Avenue roundabout to slow down approaching eastbound vehicles,” a Roads and Maritime Services submissions report stated.

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A further revision to the plan would see the direct heavy vehicle merge onto Mt Ousley Road be removed.

Instead, the off ramp will link into the eastern roundabout of the interchange, forcing heavy vehicles to slow down before exiting the roundabout onto Mt Ousley Road.

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That will mean the eastern roundabout will have five legs, which prompted Roads and Maritime Services to carry out a fresh traffic assessment.

“Overall, the additional traffic assessment found that the realignment of the heavy vehicle exit ramp into the eastern roundabout would result in intersection delays comparable to the concept design,” the assessment found.

It would also mean heavy vehicles looking to travel to University Avenue would no longer need to travel to the Gaynor Avenue roundabout to make a U-turn to use the eastern roundabout.