The World Health Organisation (WHO) has undertaken a detailed review of all the studies on the health impacts of transport noise.  In short, it found a 5 to 10% increase in Heart Attacks and High Blood Pressure.  They recommended that the night time noise be kept below 44dB ( Waverton - Wollstonecraft is around 68dB - over 250 times higher!), so the 10% impact on health is probably also higher.  

At a less severe level of consequence, the data from WHO suggest that more than 35% of the local population would experience annoyance and sleep disturbance at the current noise levels.