The $21.5 million Main West Capacity Improvement project by Transport for New South Wales provides a more efficient track corridor for rail services in the Central West, with two new passing loops. Rail loops are located at Kerrs Creek, Polona, Bumberry, Pinecliff, Rydal and Georges Plains, easing congestion for both passenger and freight trains. The project entailed around 1.8 kilometres of new track being laid, and new signalling infrastructure.

BG&E provided civil engineering services for John Holland, including the detailed design of several new passing loops and loop extensions, which included rail alignment and associated earthworks, track structure and drainage. The design reduced fill requirements and construction costs through use of recycled materials.

The project ensures the Main Western line can efficiently support freight services, which use the line to transport around nine million tonnes of freight each year, while providing a more reliable service for local passengers.