Progress Rail

Progress Rail is Caterpillar's rail business. It bought Downer Rail's locomotive business, and with it the Maryborough-built EMD designs and a few locos of its own. These days it has a small fleet of rebuilt narrow gauge locos in Queensland that it leases out, like the PRLs working for Qube up north.

References

'Downer EDI Rail GT42CU ACe', Wikipedia (accessed October 2026)
'PRL Class', Railtram Australia (accessed October 2026)