Bus priority improvements are being developed for two bus corridors that link Castle Hill with Parramatta and the Sydney CBD. The bus corridors are, Corridor 6 - Castle Hill to City via Macquarie and Corridor 40 - Castle Hill to Parramatta.

A $10 million bus priority facility to minimise bus delays and improve traffic flow at Baulkham Hills has been completed.

Works completed

Old Northern Road/Windsor Road

• Narrowing the central median in Windsor Road southbound at Baulkham Hills to create a third southbound general traffic lane from some 125 metres north to Cook Street to the M2 Motorway on ramp.
• Constructing a 24-hour southbound bus lane that operates in most of the section of Old Northern Road, Baulkham Hills, from just north of Olive Street to Windsor Road.
• Reconfiguring parking spaces in the public car park at the corner of Windsor Road and Railway Street.
• Providing left turn access into Railway Street from Windsor Road (Note: Left turns out of Windsor Road are not permitted for safety reasons).
• Widening Raemont Lane to improve two-way access to compensate for the partial closure of the southern end of Railway Street.

Windsor Road/Church Street southbound

• Converting the existing T2 lane into a red bus lane from Churchill Drive, Winston Hills, to Fletcher Street, Northmead.
• Removal of the T2 lane between Fletcher Street and the James Ruse Drive/Briens Road intersection to provide better transition for general traffic.
• Widening Windsor Road to extend the existing left turn between Campbell Street and James Ruse Drive.
• Creating a red bus lane in Windsor Road at the approach to the intersection with James Ruse Drive and Briens Road.
• Extending the existing right turn bay in Windsor Road at the intersection with Briens Road and James Ruse Drive.
• Replacing the existing T2 kerbside lane with a morning peak red bus lane in Church Street between the James Ruse Drive/Briens Road intersection and Barney Street.
• Providing a red AM bus lane between Seville Street and By Street.
• Providing a 24-hour red bus lane from Harold Street to Ross Street.

Church Street/Windsor Road northbound

• Providing a 24-hour red bus lane from Grose Street to the Albert Street/Pennant Hills Road intersection.
• Providing a dual right turn lane to help buses and general traffic turn right from Church Street into Pennant Hills Road.
• Creating a 24-hour red bus lane from Pennant Hills Road to North Rocks Road.
• Maintaining three general traffic lanes from Board Street to The Junction shopping precinct.
• Improving bus travel on strategic bus corridors serving Castle Hill.