Rehabilitation and Widening of Kwinana Freeway PSP (SLK 11.42–11.67)

About

Main Roads Western Australia awarded a contract to Garli Pty Ltd for rehabilitation and widening of the Principal Shared Path (PSP) on Kwinana Freeway between SLK 11.42 and SLK 11.67.

The works widened the sealed path to 3.3 m (two 1.5 m lanes with 0.15 m shoulders) over a 250 m length; repaired areas of tree root damage using a profile-and-replace method; applied root barrier systems where required; boxed out widening areas 100 mm deep, compacted and water-conditioned the subgrade and disposed of boxed-out material; applied 100m of Asphalt Intermediate Mix or recycled asphalt pavement (RAP) to the widening area, ensuring the widening matched the existing surface level; applied a Stress Absorbing Membrane Interlayer (SAMI) seal for the full PSP width over existing and widened asphalt; and applied 30 mm of red 10 mm dense graded aggregate (DGA) across the full PSP width.