Many of these goods sidings have closed in recent decades, requiring dedicate Perway Sidings to be built at convenient places.
On the single line from Junee to Albury, several crossing loops no longer have any sidings.
South of the border between Albury and Melbourne, some/most/all crossing loops have Cripple Sidings at each end, which could be used to stow perway machines.
Prior to duplication of the Sutherland-Cronulla line, there was a double ended goods siding. This was electrified and converted to a turnback siding. With that duplication, the lead to that siding was upgraded, becoming the Up Branch, and a new turnout laid connecting about half of the former siding as a Perway siding. On flaw in the design is that track centres between the PW Siding and the Down Main is IIRC a narrow 3.66m, instead of a safer say 5.2m including a barrier fence..
At St Leonards, part of the old Up Goods Siding(s) have be shortened as a PW siding connecting to the Up Shore. The crossover between the Up and Down Shore was partially and then completely removed, so the access from the PWS to the Down Shore must be via North Sydney or Chatswood.
At Cowan, the Up Engines Siding at the North End was extended behind the Up platform to form a Perway siding. This siding splits in two, and as far as can be told, the track centres are very narrow.
According to other threads, Campbelltown now has a Perway siding formed as a northwards extension of the Down Refuge Loop.
Epping used to have a Perway Siding formed as an extension of the IIRC catchpoints at the end of the Down North Suburban. This was abolished to make way for the ECRL.
Railpagers are invited to add more examples.