It gets busy but still not too bad. The main issue is actually the noise created by traffic especially if you live near a slope when vehicles are accelerating to get over it. The buses can be extremely loud due to this. Best to not live in houses with bedrooms near the front, unless there's good noise insulation.
It gets very busy during rush hours but if you would like to know the actual average vehicles per day passing through this street (or any other street in City of Melville) you can approach the city council office for this info.