A3 and A6 corridor capacity
The A3 and A6 corridors are major arterial roads that service north–south journeys for both freight and general traffic in Sydney. High traffic volumes on both corridors are leading to slow and unreliable trips, and are impacting on freight productivity, particularly during peak times. The 2015 Australian Infrastructure Audit identiﬁed the A3 between the M4 Motorway and Princes Highway, and the A6 between Sutherland and Ryde, as Sydney’s second and ﬁfth worst routes for congestion, as measured by delays per lane kilometre.
The A3 and A6 both connect to the M5 and M4 motorways. The A3 provides freight access between Sydney and the Sutherland Shire/Illawarra region, as well as to Sydney Airport, Port Botany and the Chullora and Enﬁeld intermodal terminals. Up to 98,500 vehicles use the A3 each day at its busiest section – Concord Road at Rhodes.
The A6 serves as a key road transport link to the Bankstown Strategic Centre, and carries approximately 65,000 vehicles a day along Stacey Street near Bankstown.
Capacity constraints on the A3 and A6 corridors could be addressed through a range of interventions, such as intersection upgrades and road widening. Potential upgrades should be considered in the context of an overall integrated program, as improvements to either of the corridors may also reduce pressure on the other.
Proponent to complete business case development (Stage 3 of Infrastructure Australia’s Assessment Framework).